Update pull request linter workflow to standardize event types

Author: Brijeshthummar02

.github/workflows/pr_linter.yml

@@ -2,7 +2,11 @@ name: "PR: Checklist linter"
 
 on:
   pull_request_target:
-    types: [opened, edited, synchronize, reopened]
+    types:
+      - opened
+      - reopened
+      - synchronize
+      - edited
 
 permissions:
   checks: write