Bump dessant/lock-threads from 3 to 4 (#1153)

Author: davidism

.github/workflows/lock.yaml

@@ -12,7 +12,7 @@ jobs:
   lock:
     runs-on: ubuntu-latest
     steps:
-      - uses: dessant/lock-threads@v3
+      - uses: dessant/lock-threads@v4
         with:
           github-token: ${{ github.token }}
           issue-inactive-days: 14