Bump sigstore/gh-action-sigstore-python from 2.0.1 to 2.1.0

Bumps [sigstore/gh-action-sigstore-python](https://github.com/sigstore/gh-action-sigstore-python) from 2.0.1 to 2.1.0.
- [Release notes](https://github.com/sigstore/gh-action-sigstore-python/releases)
- [Commits](sigstore/gh-action-sigstore-python@v2.0.1...v2.1.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/release.yml

@@ -100,7 +100,7 @@ jobs:
       with:
         repository-url: ${{ vars.REPOSITORY_URL }}
     - name: Sign with sigstore
-      uses: sigstore/gh-action-sigstore-python@v2.0.1
+      uses: sigstore/gh-action-sigstore-python@v2.1.0
       with:
         inputs: ./dist/*
         # useful to inspect workflow artifacts in test runs