use pull_request event

Author: binoy14

.github/workflows/pr-validate.yml

@@ -1,12 +1,7 @@
 name: "Validate PR"
 
 on:
-  pull_request_target:
-    types:
-      - opened
-      - edited
-      - synchronize
-      - reopened
+  pull_request:
 
 permissions:
   pull-requests: read