.github: remove the test branch in release workflow

Signed-off-by: Wei Fu <weifu@microsoft.com>

Author: fuweid

.github/workflows/release.yml

@@ -1,8 +1,6 @@
 name: Release
 on:
   push:
-    branches:
-      - "add-release-workflow"
     tags:
       - v*
 env:
@@ -34,4 +32,4 @@ jobs:
           echo IMAGE_ID=$IMAGE_ID
           echo VERSION=$VERSION
           docker tag $IMAGE_NAME $IMAGE_ID:$VERSION
-          docker push $IMAGE_ID:$VERSION
+          docker push $IMAGE_ID:$VERSION