Update labeler.yml to use v4

Signed-off-by: Vivek Vishal <vishalvivek488@gmail.com>

Author: Vivek Vishal

.github/workflows/labeler.yml

@@ -9,6 +9,6 @@ jobs:
       pull-requests: write
     runs-on: ubuntu-22.04
     steps:
-    - uses: actions/labeler@v5
+    - uses: actions/labeler@v4
       with:
         repo-token: "${{ secrets.GITHUB_TOKEN }}"