build(deps): bump pypa/gh-action-pypi-publish from 1.5.1 to 1.6.4

Bumps [pypa/gh-action-pypi-publish](https://github.com/pypa/gh-action-pypi-publish) from 1.5.1 to 1.6.4.
- [Release notes](https://github.com/pypa/gh-action-pypi-publish/releases)
- [Commits](https://github.com/pypa/gh-action-pypi-publish/compare/v1.5.1...v1.6.4)

---
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>

.github/workflows/release.yml

@@ -55,7 +55,7 @@ jobs:
       # all previous steps always run in order to exercise them
       - name: Publish distribution to PyPI
         if: startsWith(github.ref, 'refs/tags')
-        uses: pypa/gh-action-pypi-publish@v1.5.1
+        uses: pypa/gh-action-pypi-publish@v1.6.4
         with:
           password: ${{ secrets.PYPI_PASSWORD }}