trigger on pull_request_target

Author: benieric

.github/workflows/codebuild-ci.yml

@@ -1,6 +1,6 @@
 name: PR Checks
 on:
-    pull_request:
+    pull_request_target:
 
 concurrency:
     group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}