⬆️ Update dessant/lock-threads action to v6

Author: renovate[bot]

.github/workflows/lock.yaml

@@ -18,7 +18,7 @@ jobs:
       issues: write  # To lock issues
       pull-requests: write  # To lock PRs
     steps:
-      - uses: dessant/lock-threads@1bf7ec25051fe7c00bdd17e6a7cf3d7bfb7dc771 # v5.0.1
+      - uses: dessant/lock-threads@7266a7ce5c1df01b1c6db85bf8cd86c737dadbe7 # v6.0.0
         with:
           github-token: ${{ github.token }}
           issue-inactive-days: "30"