build(deps): 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 3.7.0 to 3.8.0
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@dc72c7d...c56c2d3)

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

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

Author: dependabot[bot]

.github/workflows/master.yml

@@ -34,7 +34,7 @@ jobs:
         uses: gradle/actions/dependency-submission@473878a77f1b98e2b5ac4af93489d1656a80a5ed # ratchet:gradle/actions/dependency-submission@v4
       - name: Gradle build
         run: ./gradlew build
-      - uses: sigstore/cosign-installer@dc72c7d5c4d10cd6bcb8cf6e3fd625a9e5e537da # ratchet:sigstore/cosign-installer@v3
+      - uses: sigstore/cosign-installer@c56c2d3e59e4281cc41dea2217323ba5694b171e # ratchet:sigstore/cosign-installer@v3
       - name: Verify distroless base image
         run: |
           cosign verify \