Update TimonVS/pr-labeler-action action to v4 (#37)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/pr-labeler.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: TimonVS/pr-labeler-action@v3
+      - uses: TimonVS/pr-labeler-action@v4
         with:
           configuration-path: .github/pr-labeler.yml
         env: