Bump sigstore/gh-action-sigstore-python from 2.1.0 to 2.1.1 (#2293)

Bumps [sigstore/gh-action-sigstore-python](https://github.com/sigstore/gh-action-sigstore-python) from 2.1.0 to 2.1.1.
- [Release notes](https://github.com/sigstore/gh-action-sigstore-python/releases)
- [Commits](https://github.com/sigstore/gh-action-sigstore-python/compare/v2.1.0...v2.1.1)

---
updated-dependencies:
- dependency-name: sigstore/gh-action-sigstore-python
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/publish.yml

@@ -47,7 +47,7 @@ jobs:
         uses: pypa/gh-action-pypi-publish@v1.8.11
 
       - name: sign
-        uses: sigstore/gh-action-sigstore-python@v2.1.0
+        uses: sigstore/gh-action-sigstore-python@v2.1.1
         with:
           inputs: ./dist/*.tar.gz ./dist/*.whl
           release-signing-artifacts: true