chore(deps): update dessant/lock-threads action to v6 (#3)

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

Author: renovate[bot]

.github/workflows/issue-bot.yml

@@ -182,7 +182,7 @@ jobs:
     if: ${{ inputs.enable-lock && (github.event_name == 'schedule' || github.event_name == 'workflow_dispatch') }}
     steps:
       - name: Lock closed threads
-        uses: dessant/lock-threads@v5
+        uses: dessant/lock-threads@v6
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           issue-inactive-days: ${{ inputs.issue-inactive-days-before-lock }}