disable default attestations

.github/workflows/release.yml

@@ -48,6 +48,8 @@ jobs:
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
+        env:
+          BUILDX_NO_DEFAULT_ATTESTATIONS: 1
 
       - name: Log in to the Container registry
         uses: docker/login-action@v2