Merge pull request #476 from puppetlabs/pdksync_pdksync-use_pull_request_target

pdksync - PDKSYNC Update labeller trigger

Author: LukasAud

.github/workflows/labeller.yml

@@ -4,7 +4,7 @@ on:
   issues:
     types:
       - opened
-  pull_request:
+  pull_request_target:
     types:
       - opened