Pin actions/stale action to 1160a22

.github/workflows/repo-stale.yaml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     if: ${{ contains(github.repository, 'jellyfin/') }}
     steps:
-      - uses: actions/stale@v8
+      - uses: actions/stale@1160a2240286f5da8ec72b1c0816ce2481aabf84 # v8
         with:
           repo-token: ${{ secrets.JF_BOT_TOKEN }}
           days-before-stale: 120