Modified job to only fire when opened or target edited. (#4915)

.github/workflows/label-issue-pull-request.yml

@@ -5,7 +5,7 @@ name: Label Issue Pull Request
 
 on:
   pull_request:
-    types: [opened, synchronize, edited] # Check when PR is opened, new pushes are made, or target branch is edited
+    types: [opened, edited] # Check when PR is opened or target branch is edited
     paths-ignore:
       - .github/workflows/** # We don't need QA on workflow changes
     branches: