build(deps): bump idna from 3.7 to 3.8 in the dependencies group

Bumps the dependencies group with 1 update: [idna](https://github.com/kjd/idna).


Updates `idna` from 3.7 to 3.8
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.rst)
- [Commits](kjd/idna@v3.7...v3.8)

---
updated-dependencies:
- dependency-name: idna
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements/pinned.txt

@@ -2,7 +2,7 @@ certifi==2024.7.4        # via requests
 cffi==1.17.0              # via cryptography, pynacl
 charset-normalizer==3.3.2 # via requests
 cryptography==43.0.0      # via securesystemslib
-idna==3.7                 # via requests
+idna==3.8                 # via requests
 pycparser==2.22           # via cffi
 pynacl==1.5.0             # via securesystemslib
 requests==2.32.3