Run enforce-pr-rebase whenever a PR is updated

Author: Flole998

.github/workflows/enforce-pr-rebase.yml

@@ -1,6 +1,11 @@
 name: Enforce Rebasing
 
-on: [push]
+on:
+  pull_request:
+    branches:
+      - master
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
 
 jobs:
   rebase_job: