chore: Don't run on reopen (as you need to reopen to change the base branch)

Author: franky47

Diff for: .github/workflows/pr-base-enforcement.yml

@@ -2,6 +2,7 @@ name: Prevent PRs targetting master
 
 on:
   pull_request:
+    types: [opened, edited]
     branches:
       - master