Bump sigstore/cosign-installer from 3.8.1 to 3.9.1

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from 3.8.1 to 3.9.1.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@d7d6bc7...398d4b0)

---
updated-dependencies:
- dependency-name: sigstore/cosign-installer
  dependency-version: 3.9.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/publish-release.yml

@@ -53,7 +53,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Install Cosign
-        uses: sigstore/cosign-installer@d7d6bc7722e3daa8354c50bcb52f4837da5e9b6a # @v3.8.1
+        uses: sigstore/cosign-installer@398d4b0eeef1380460a10c8013a76f728fb906ac # @v3.9.1
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3