build(deps): bump pypa/gh-action-pypi-publish from 1.7.1 to 1.8.1

Bumps [pypa/gh-action-pypi-publish](https://github.com/pypa/gh-action-pypi-publish) from 1.7.1 to 1.8.1.
- [Release notes](https://github.com/pypa/gh-action-pypi-publish/releases)
- [Commits](pypa/gh-action-pypi-publish@22b4d1f...a3a3baf)

---
updated-dependencies:
- dependency-name: pypa/gh-action-pypi-publish
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/cd.yml

@@ -102,7 +102,7 @@ jobs:
       - name: Publish binary wheel and source tarball on PyPI
         # Only attempt pypi upload in upstream repository
         if: github.repository == 'theupdateframework/python-tuf'
-        uses: pypa/gh-action-pypi-publish@22b4d1f12511f2696162c08546dafbaa903448a2
+        uses: pypa/gh-action-pypi-publish@a3a3bafbb3e5a75a854ae1bc53ae128cf22c4af4
         with:
           user: __token__
           password: ${{ secrets.PYPI_API_TOKEN }}