Bump sigstore/gh-action-sigstore-python from 1.2.3 to 2.1.1

Bumps [sigstore/gh-action-sigstore-python](https://github.com/sigstore/gh-action-sigstore-python) from 1.2.3 to 2.1.1.
- [Release notes](https://github.com/sigstore/gh-action-sigstore-python/releases)
- [Commits](sigstore/gh-action-sigstore-python@v1.2.3...v2.1.1)

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

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

.github/workflows/pypi.yml

@@ -62,7 +62,7 @@ jobs:
           name: python-package-distributions
           path: dist/
       - name: Sign the dists with Sigstore
-        uses: sigstore/gh-action-sigstore-python@v1.2.3
+        uses: sigstore/gh-action-sigstore-python@v2.1.1
         with:
           inputs: >-
             ./dist/*.tar.gz