Update github workflow

Author: matthewelwell

.github/workflows/pull_request.yaml

@@ -14,11 +14,13 @@ on:
       - synchronize
       - reopened
       - ready_for_review
+    branches:
+      - main
+      - release/**
 
   push:
     branches:
       - main
-      - release/**
 
 permissions:
   contents: read