[build] use the right PAT to get label commenter to work

Author: titusfortner

.github/workflows/label-commenter.yml

@@ -26,5 +26,5 @@ jobs:
         with:
           # The individual PAT is needed so commenter can auto-executes on PRs from Forks
           # It expires 4/1/2026
-          github_token: ${{ secrets.LABEL_COMMENTER_PAT }}
+          github_token: ${{ secrets.PR_LABELER_PAT }}
           config_file: .github/label-commenter-config.yml