Bump sigstore/cosign-installer from 3.7.0 to 3.8.0

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from 3.7.0 to 3.8.0.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@v3.7.0...v3.8.0)

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

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

.github/workflows/reusable-build.yml

@@ -173,7 +173,7 @@ jobs:
             digest=$(sudo skopeo inspect docker://${{ steps.registry_case.outputs.lowercase }}/${{ env.dest_image }}:${{ env.dest_tag }} --format '{{.Digest}}')
             echo "digest=${digest}" >> $GITHUB_OUTPUT
 
-      - uses: sigstore/cosign-installer@v3.7.0
+      - uses: sigstore/cosign-installer@v3.8.0
         if: github.event_name != 'pull_request'
 
       - name: Sign Container Image