Update actions/stale action to v8

.github/workflows/repo-stale.yaml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     if: ${{ contains(github.repository, 'jellyfin/') }}
     steps:
-      - uses: actions/stale@6f05e4244c9a0b2ed3401882b05d701dd0a7289b # v7.0.0
+      - uses: actions/stale@1160a2240286f5da8ec72b1c0816ce2481aabf84 # v8.0.0
         with:
           repo-token: ${{ secrets.JF_BOT_TOKEN }}
           days-before-stale: 120