Bump sigstore/cosign-installer in the github-actions group

Bumps the github-actions group with 1 update: [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer).


Updates `sigstore/cosign-installer` from 4.1.1 to 4.1.2
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@v4.1.1...v4.1.2)

---
updated-dependencies:
- dependency-name: sigstore/cosign-installer
  dependency-version: 4.1.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/docker-image.yaml

@@ -33,7 +33,7 @@ jobs:
           submodules: "recursive"
 
       - name: Install cosign
-        uses: sigstore/cosign-installer@v4.1.1
+        uses: sigstore/cosign-installer@v4.1.2
 
       - name: Log into registry ${{ env.REGISTRY }}
         uses: docker/login-action@v4.1.0