Revert "ci: TEMP - trigger on u/** pushes (REVERT BEFORE UPSTREAM PR)"

This reverts commit 1d89583.

Author: guru-desh

.github/workflows/ci.yaml

@@ -9,7 +9,7 @@ on:
   pull_request:
     branches: [main]
   push:
-    branches: [main, 'u/**']
+    branches: [main]
 
 permissions:
   contents: read