Change to run on pull_request_target

.github/workflows/copy-label-to-pr.yml

@@ -1,13 +1,13 @@
 name: Copy Labels to PR
 on:
-  pull_request:
+  pull_request_target:
     types: [opened]
 
 jobs:
   copy-labels:
     permissions:
       contents: read
-      issues: write
+      issues: read
       pull-requests: write
     runs-on: ubuntu-latest
     name: Copy labels from linked issues