fix image check

.gitea/workflows/release.yml

@@ -35,6 +35,7 @@ jobs:
         id: check_image
         run: |
           IMAGE_TAG="${IMAGE_NAME}:${FLUTTER_VERSION}"
+          echo "Checking ${IMAGE_TAG}..."
           if docker manifest inspect $IMAGE_TAG > /dev/null 2>&1; then
             echo "Image already exists for $FLUTTER_VERSION"
             echo "exists=true" >> $GITHUB_OUTPUT