build(deps): bump sigstore/cosign-installer from 3.0.1 to 3.1.2 (#81)

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from 3.0.1 to 3.1.2.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@v3.0.1...v3.1.2)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/release.yml

@@ -74,7 +74,7 @@ jobs:
 
       - name: Install cosign
         if: ${{ steps.image_exists.outcome != 'success' && github.event_name != 'pull_request' }}
-        uses: sigstore/cosign-installer@v3.0.1
+        uses: sigstore/cosign-installer@v3.1.2
 
       - name: Sign the published Docker image
         if: ${{ steps.image_exists.outcome != 'success' && github.event_name != 'pull_request' }}