Added 'subject-name' in attestation generation step in release workflow

.github/workflows/release.yml

@@ -70,7 +70,7 @@ jobs:
       - name: Generate artifact attestation
         uses: actions/attest-build-provenance@v1
         with:
-          subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME}}
+          subject-name: ghcr.io/echovault/echovault
           subject-digest: ${{ steps.push.outputs.digest }}
           push-to-registry: true