cosign sign scorespec/score-compose (#398)

Signed-off-by: Mathieu Benoit <[email protected]>

Author: mathieu-benoit

.github/workflows/release.yaml

@@ -68,3 +68,4 @@ jobs:
       - name: Sign container image
         run: |
           cosign sign --yes ghcr.io/score-spec/score-compose@${{ steps.build-push-container.outputs.digest }}
+          cosign sign --yes scorespec/score-compose@${{ steps.build-push-container.outputs.digest }}