move back to pull_request_target

Author: Mpdreamz

.github/workflows/preview-build.yml

@@ -1,8 +1,11 @@
 name: preview-build
 
 on:
-  pull_request:
-
+  pull_request_target:
+    types:
+      - opened
+      - synchronize
+      - reopened
   push:
     branches:
       - main