Update dessant/lock-threads action to v4 (#535)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/lock-threads.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Lock inactive threads
-        uses: dessant/lock-threads@v3.0.0
+        uses: dessant/lock-threads@v4.0.0
         with:
           issue-inactive-days: 30
           pr-inactive-days: 30