[skip ci] Update dessant/lock-threads

Author: Syer10

.github/workflows/lock.yml

@@ -12,7 +12,7 @@ jobs:
   lock:
     runs-on: ubuntu-latest
     steps:
-      - uses: dessant/lock-threads@v5
+      - uses: dessant/lock-threads@v6
         with:
           github-token: ${{ github.token }}
           issue-inactive-days: '2'