Fix security vulnerability

See https://docs.google.com/document/d/1JBoQ17BU4iDXwofgzN1UOQY5Z61nBmwa17FJ_ZccLKI/edit?tab=t.0

Author: jermainezhimin

.github/workflows/content-checks.yml

@@ -1,6 +1,6 @@
 name: Content Checks
 on:
-  pull_request_target:
+  pull_request:
     types:
       - opened
       - synchronize