Bump sigstore/gh-action-sigstore-python from 2.1.0 to 2.1.1

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](sigstore/gh-action-sigstore-python@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
...

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

.github/workflows/release.yml

@@ -97,7 +97,7 @@ jobs:
           name: echidna-redistributable
 
       - name: Sign binaries
-        uses: sigstore/[email protected].0
+        uses: sigstore/[email protected].1
         with:
           inputs: ./echidna-*.tar.gz