Bump pypa/gh-action-pypi-publish from 1.5.1 to 1.6.4 (#23)

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](pypa/gh-action-pypi-publish@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] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Nicholas Smith <[email protected]>

.github/workflows/ci.yml

@@ -83,7 +83,7 @@ jobs:
       - name: Check products
         run: pipx run twine check dist/*
 
-      - uses: pypa/gh-action-pypi-publish@v1.5.1
+      - uses: pypa/gh-action-pypi-publish@v1.6.4
         if: github.event_name == 'release' && github.event.action == 'published'
         with:
           user: __token__