Bump dessant/lock-threads from 3.0.0 to 4.0.0 (flutter#116545)

Bumps [dessant/lock-threads](https://github.com/dessant/lock-threads) from 3.0.0 to 4.0.0.
- [Release notes](https://github.com/dessant/lock-threads/releases)
- [Changelog](https://github.com/dessant/lock-threads/blob/master/CHANGELOG.md)
- [Commits](dessant/lock-threads@e460dfe...c1b35ae)

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

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

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

.github/workflows/lock.yaml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     if: ${{ github.repository == 'flutter/flutter' }}
     steps:
-      - uses: dessant/lock-threads@e460dfeb36e731f3aeb214be6b0c9a9d9a67eda6
+      - uses: dessant/lock-threads@c1b35aecc5cdb1a34539d14196df55838bb2f836
         with:
           process-only: 'issues'
           github-token: ${{ github.token }}