diag: trigger on push to diag-uno branch

Author: bnaras

.github/workflows/diagnose-uno-windows.yml

@@ -5,6 +5,8 @@ name: Diagnose Uno on Windows
 # trigger only -- not part of the publish pipeline.
 
 on:
+  push:
+    branches: [diag-uno]
   workflow_dispatch:
 
 jobs: