Bump sigstore/gh-action-sigstore-python from 3.2.0 to 3.3.0 (#480)

Bumps [sigstore/gh-action-sigstore-python](https://github.com/sigstore/gh-action-sigstore-python) from 3.2.0 to 3.3.0.
- [Release notes](https://github.com/sigstore/gh-action-sigstore-python/releases)
- [Changelog](https://github.com/sigstore/gh-action-sigstore-python/blob/main/CHANGELOG.md)
- [Commits](sigstore/gh-action-sigstore-python@v3.2.0...v3.3.0)

---
updated-dependencies:
- dependency-name: sigstore/gh-action-sigstore-python
  dependency-version: 3.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Michael Dockter <michael@dockter.com>
Co-authored-by: Sam <109683132+kernelsam@users.noreply.github.com>

Author: 3 people

.github/workflows/publish-to-pypi.yaml

@@ -83,7 +83,7 @@ jobs:
           path: dist/
 
       - name: Sign the dists with Sigstore
-        uses: sigstore/gh-action-sigstore-python@v3.2.0
+        uses: sigstore/gh-action-sigstore-python@v3.3.0
         with:
           inputs: >-
             ./dist/*.tar.gz