Fix subject-name

.github/workflows/build.yaml

@@ -3,12 +3,8 @@ on: push
 jobs:
   Build:
     runs-on: ubuntu-latest
-    permissions:
-      contents: read
-      packages: write
-      attestations: write
-      id-token: write
-
+    env:
+      IMAGE: ghcr.io/${{ github.repository }}
     steps:
       - uses: actions/checkout@v4
 
@@ -21,7 +17,7 @@ jobs:
       - uses: docker/metadata-action@v5
         id: meta
         with:
-          images: ghcr.io/${{ github.repository }}
+          images: {{ env.IMAGE }}
 
       - uses: docker/bake-action@v5
         with:
@@ -32,7 +28,7 @@ jobs:
 
       - uses: actions/attest-build-provenance@v1
         with:
-          subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME}}
+          subject-name: {{ env.IMAGE }}
           subject-digest: ${{ steps.push.outputs.digest }}
           push-to-registry: true