chore(workflow): stale: upgrade to use "actions/stale@v4"

Author: hasezoey

.github/workflows/stale.yml

@@ -10,7 +10,7 @@ jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/stale@v3
+      - uses: actions/stale@v4
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
           stale-issue-message: 'Marking Issue as stale, will be closed in 7 days if no more activity is seen'