fixup! Use correct credentials to push images

Signed-off-by: Nicolas Belouin <nicolas.belouin@suse.com>

.github/workflows/build-rust-containers.yml

@@ -140,6 +140,7 @@ jobs:
       uses: docker/setup-buildx-action@v3
 
     - name: Login to GitHub Container Registry
+      if: github.event_name == 'push' || github.event_name == 'release'
       uses: docker/login-action@v3
       with:
         registry: ghcr.io