Bump dessant/lock-threads from 3 to 4

Bumps [dessant/lock-threads](https://github.com/dessant/lock-threads) from 3 to 4.
- [Release notes](https://github.com/dessant/lock-threads/releases)
- [Changelog](https://github.com/dessant/lock-threads/blob/main/CHANGELOG.md)
- [Commits](dessant/lock-threads@v3...v4)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/lock-threads.yml

@@ -17,7 +17,7 @@ jobs:
     if: github.repository_owner == 'pypa'
     runs-on: ubuntu-latest
     steps:
-      - uses: dessant/lock-threads@v3
+      - uses: dessant/lock-threads@v4
         with:
           issue-inactive-days: '30'
           pr-inactive-days: '15'