Revert "chore(deps): bump actions/labeler from 4 to 5 (#584)"

This reverts commit 5c5f2cd.

Author: hnnasit

.github/workflows/pr-labeler.yml

@@ -9,7 +9,7 @@ jobs:
       pull-requests: write
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/labeler@v5
+    - uses: actions/labeler@v4
       with:
         repo-token: "${{ secrets.GITHUB_TOKEN }}"
   apply-internal-external-label: