chore(deps): bump dessant/lock-threads from 5 to 6 (#3729)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/stale.yml

@@ -31,4 +31,4 @@ jobs:
           exempt-pr-labels: keep-open
           operations-per-run: 1000
       - name: Lock closed issues and PRs
-        uses: dessant/lock-threads@v5
+        uses: dessant/lock-threads@v6