chore(deps): update actions/cache action to v6 (#18678)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/cache](https://redirect.github.com/actions/cache) | action |
major | `v4` → `v6` |
| [actions/cache](https://redirect.github.com/actions/cache) | action |
major | `v5` → `v6` |

---

### Release Notes

<details>
<summary>actions/cache</summary>

###
[`v6.1.0`](https://redirect.github.com/actions/cache/releases/tag/v6.1.0)

[Compare
Source](https://redirect.github.com/actions/cache/compare/v6.0.0...v6.1.0)

#### What's Changed

- Bump
[@&#8203;actions/cache](https://redirect.github.com/actions/cache) to
v6.1.0 - handle read-only cache access by
[@&#8203;jasongin](https://redirect.github.com/jasongin) in
[#&#8203;1768](https://redirect.github.com/actions/cache/pull/1768)

**Full Changelog**:
<actions/cache@v6...v6.1.0>

###
[`v6.0.0`](https://redirect.github.com/actions/cache/releases/tag/v6.0.0)

[Compare
Source](https://redirect.github.com/actions/cache/compare/v5.1.0...v6.0.0)

##### What's Changed

- Update packages, migrate to ESM by
[@&#8203;Samirat](https://redirect.github.com/Samirat) in
[#&#8203;1760](https://redirect.github.com/actions/cache/pull/1760)

**Full Changelog**:
<actions/cache@v5...v6.0.0>

###
[`v5.1.0`](https://redirect.github.com/actions/cache/releases/tag/v5.1.0)

[Compare
Source](https://redirect.github.com/actions/cache/compare/v5.0.5...v5.1.0)

#### What's Changed

- Bump
[@&#8203;actions/cache](https://redirect.github.com/actions/cache) to
v5.1.0 - handle read-only cache access by
[@&#8203;jasongin](https://redirect.github.com/jasongin) in
[#&#8203;1775](https://redirect.github.com/actions/cache/pull/1775)

**Full Changelog**:
<actions/cache@v5...v5.1.0>

###
[`v5.0.5`](https://redirect.github.com/actions/cache/releases/tag/v5.0.5)

[Compare
Source](https://redirect.github.com/actions/cache/compare/v5.0.4...v5.0.5)

#### What's Changed

- Update ts-http-runtime dependency by
[@&#8203;yacaovsnc](https://redirect.github.com/yacaovsnc) in
[#&#8203;1747](https://redirect.github.com/actions/cache/pull/1747)

**Full Changelog**:
<actions/cache@v5...v5.0.5>

###
[`v5.0.4`](https://redirect.github.com/actions/cache/releases/tag/v5.0.4)

[Compare
Source](https://redirect.github.com/actions/cache/compare/v5.0.3...v5.0.4)

##### What's Changed

- Add release instructions and update maintainer docs by
[@&#8203;Link-](https://redirect.github.com/Link-) in
[#&#8203;1696](https://redirect.github.com/actions/cache/pull/1696)
- Potential fix for code scanning alert no. 52: Workflow does not
contain permissions by
[@&#8203;Link-](https://redirect.github.com/Link-) in
[#&#8203;1697](https://redirect.github.com/actions/cache/pull/1697)
- Fix workflow permissions and cleanup workflow names / formatting by
[@&#8203;Link-](https://redirect.github.com/Link-) in
[#&#8203;1699](https://redirect.github.com/actions/cache/pull/1699)
- docs: Update examples to use the latest version by
[@&#8203;XZTDean](https://redirect.github.com/XZTDean) in
[#&#8203;1690](https://redirect.github.com/actions/cache/pull/1690)
- Fix proxy integration tests by
[@&#8203;Link-](https://redirect.github.com/Link-) in
[#&#8203;1701](https://redirect.github.com/actions/cache/pull/1701)
- Fix cache key in examples.md for bun.lock by
[@&#8203;RyPeck](https://redirect.github.com/RyPeck) in
[#&#8203;1722](https://redirect.github.com/actions/cache/pull/1722)
- Update dependencies & patch security vulnerabilities by
[@&#8203;Link-](https://redirect.github.com/Link-) in
[#&#8203;1738](https://redirect.github.com/actions/cache/pull/1738)

##### New Contributors

- [@&#8203;XZTDean](https://redirect.github.com/XZTDean) made their
first contribution in
[#&#8203;1690](https://redirect.github.com/actions/cache/pull/1690)
- [@&#8203;RyPeck](https://redirect.github.com/RyPeck) made their first
contribution in
[#&#8203;1722](https://redirect.github.com/actions/cache/pull/1722)

**Full Changelog**:
<actions/cache@v5...v5.0.4>

###
[`v5.0.3`](https://redirect.github.com/actions/cache/releases/tag/v5.0.3)

[Compare
Source](https://redirect.github.com/actions/cache/compare/v5.0.2...v5.0.3)

##### What's Changed

- Bump `@actions/cache` to v5.0.5 (Resolves:
<https://github.com/actions/cache/security/dependabot/33>)
- Bump `@actions/core` to v2.0.3

**Full Changelog**:
<actions/cache@v5...v5.0.3>

###
[`v5.0.2`](https://redirect.github.com/actions/cache/releases/tag/v5.0.2):
v.5.0.2

[Compare
Source](https://redirect.github.com/actions/cache/compare/v5.0.1...v5.0.2)

##### v5.0.2

##### What's Changed

When creating cache entries, 429s returned from the cache service will
not be retried.

###
[`v5.0.1`](https://redirect.github.com/actions/cache/releases/tag/v5.0.1)

[Compare
Source](https://redirect.github.com/actions/cache/compare/v5.0.0...v5.0.1)

> \[!IMPORTANT]
> **`actions/cache@v5` runs on the Node.js 24 runtime and requires a
minimum Actions Runner version of `2.327.1`.**
>
> If you are using self-hosted runners, ensure they are updated before
upgrading.

***

##### v5.0.1

##### What's Changed

- fix: update
[@&#8203;actions/cache](https://redirect.github.com/actions/cache) for
Node.js 24 punycode deprecation by
[@&#8203;salmanmkc](https://redirect.github.com/salmanmkc) in
[#&#8203;1685](https://redirect.github.com/actions/cache/pull/1685)
- prepare release v5.0.1 by
[@&#8203;salmanmkc](https://redirect.github.com/salmanmkc) in
[#&#8203;1686](https://redirect.github.com/actions/cache/pull/1686)

##### v5.0.0

##### What's Changed

- Upgrade to use node24 by
[@&#8203;salmanmkc](https://redirect.github.com/salmanmkc) in
[#&#8203;1630](https://redirect.github.com/actions/cache/pull/1630)
- Prepare v5.0.0 release by
[@&#8203;salmanmkc](https://redirect.github.com/salmanmkc) in
[#&#8203;1684](https://redirect.github.com/actions/cache/pull/1684)

**Full Changelog**:
<actions/cache@v5...v5.0.1>

###
[`v5.0.0`](https://redirect.github.com/actions/cache/releases/tag/v5.0.0)

[Compare
Source](https://redirect.github.com/actions/cache/compare/v4.3.0...v5.0.0)

> \[!IMPORTANT]
> **`actions/cache@v5` runs on the Node.js 24 runtime and requires a
minimum Actions Runner version of `2.327.1`.**
>
> If you are using self-hosted runners, ensure they are updated before
upgrading.

***

##### What's Changed

- Upgrade to use node24 by
[@&#8203;salmanmkc](https://redirect.github.com/salmanmkc) in
[#&#8203;1630](https://redirect.github.com/actions/cache/pull/1630)
- Prepare v5.0.0 release by
[@&#8203;salmanmkc](https://redirect.github.com/salmanmkc) in
[#&#8203;1684](https://redirect.github.com/actions/cache/pull/1684)

**Full Changelog**:
<actions/cache@v4.3.0...v5.0.0>

</details>

---

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---

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---

This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/googleapis/google-cloud-python).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0NC4xNTUuMiIsInVwZGF0ZWRJblZlciI6IjQ0LjE2NC4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->

---------

Co-authored-by: Anthonios Partheniou <partheniou@google.com>

Author: renovate-bot

.github/workflows/gapic-generator-tests.yml

@@ -362,7 +362,7 @@ jobs:
           persist-credentials: false
       - name: Cache Bazel files
         id: cache-bazel
-        uses: actions/cache@caa296126883cff596d87d8935842f9db880ef25 # v5
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6
         with:
           path: ~/.cache/bazel
           # Ensure CACHE_VERSION is defined in the mono-repo secrets!

.github/workflows/prerelease-deps.yml

@@ -64,7 +64,7 @@ jobs:
           allow-prereleases: true
 
       - name: Cache pip wheels (including compiled source builds)
-        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6
         with:
           path: ~/.cache/pip
           # Save a fresh cache snapshot for each run so newly compiled wheels are persisted

packages/db-dtypes/noxfile.py

@@ -265,6 +265,11 @@ def prerelease(session, tests_path):
         "pytest",
         "pytest-cov",
         "pytest-asyncio",
+        # tzdata is only needed for testing: pandas 3.0+ no longer installs
+        # tzdata by default on Linux, and compliance tests import
+        # pandas.tests.extension.base (which loads pandas.conftest and
+        # initializes a "US/Pacific" date_range via zoneinfo).
+        "tzdata",
         "-c",
         constraints_path,
     )