Bump actions/stale from v3.0.12 to v3.0.13 (v2fly#382)

Bumps [actions/stale](https://github.com/actions/stale) from v3.0.12 to v3.0.13.
- [Release notes](https://github.com/actions/stale/releases)
- [Commits](actions/stale@v3.0.12...af40726)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/stale.yml

@@ -8,7 +8,7 @@ jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/[email protected].12
+      - uses: actions/[email protected].13
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
           stale-issue-message: "This issue is stale because it has been open 120 days with no activity. Remove stale label or comment or this will be closed in 5 days"