fix: update pr-labeler job to checkout repo itself (#4127)

.github/workflows/pr-labeler.yml

@@ -1,19 +1,19 @@
 # https://github.com/actions/labeler#create-workflow
 
 name: Label Pull Requests
-
 on:
-  pull_request:
+  pull_request_target:
 
 jobs:
-  prs:
-    name: Triage
+  labeler:
     permissions:
       contents: read
       pull-requests: write
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/labeler@v5
-        with:
-          repo-token: "${{ secrets.GITHUB_TOKEN }}"
-          configuration-path: ".github/pr-labeler.yml"
+    - uses: actions/checkout@v4
+      with:
+        repository: "gitbutlerapp/gitbutler"
+    - uses: actions/labeler@v5
+      with:
+        configuration-path: '.github/pr-labeler.yml'