Upgrade lock-threads

Author: bblanchon

.github/workflows/lock.yml

@@ -13,7 +13,7 @@ jobs:
   lock:
     runs-on: ubuntu-latest
     steps:
-      - uses: dessant/lock-threads@v3
+      - uses: dessant/lock-threads@v5
         with:
           github-token: ${{ github.token }}
           issue-inactive-days: 30