Bump dessant/lock-threads from 5.0.1 to 6.0.0

Bumps [dessant/lock-threads](https://github.com/dessant/lock-threads) from 5.0.1 to 6.0.0.
- [Release notes](https://github.com/dessant/lock-threads/releases)
- [Changelog](https://github.com/dessant/lock-threads/blob/main/CHANGELOG.md)
- [Commits](dessant/lock-threads@1bf7ec2...7266a7c)

---
updated-dependencies:
- dependency-name: dessant/lock-threads
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/lock-issues.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: 'Lock Issues'
-        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'