chore: disable PR labeller for forks (FuelLabs#2574)

* chore: added permissions for pr-labeller

* chore: fix indent

* chore: rebuild

* chore: fix

* chore: try assigning perms to job

* chore: disable pr labeller on forks

Author: petertonysmith94

.github/workflows/pr-labeler.yml

@@ -7,7 +7,7 @@ on:
 jobs:
   label_pull_request:
     runs-on: ubuntu-latest
-
+    if: ${{ github.event.pull_request.head.repo.full_name == github.repository }}
     steps:
       - uses: fuxingloh/multi-labeler@v4
         with: