Fix Docker image attestation

Author: TimWolla

.github/workflows/release.yml

@@ -63,6 +63,7 @@ jobs:
         run: echo version=${GITHUB_REF/refs\/tags\/v/} >> $GITHUB_OUTPUT
       - uses: actions/checkout@v4
       - uses: docker/build-push-action@v6
+        id: build
         with:
           context: files_wcf/acp/be.bastelstu.wcf.nodePush/
           push: true