Change pull_request to pull_request_target in workflow

Author: DecimalTurn

.github/workflows/preview.yml

@@ -1,7 +1,7 @@
 name: Deploy PR previews
 
 on:
-  pull_request:
+   pull_request_target:
     types:
       - opened
       - reopened
@@ -27,3 +27,4 @@ jobs:
           source-dir: ./
 
           preview-branch: main
+