Bump phan/phan from 5.4.3 to 5.4.4 in /tools/phan

Bumps [phan/phan](https://github.com/phan/phan) from 5.4.3 to 5.4.4.
- [Release notes](https://github.com/phan/phan/releases)
- [Changelog](https://github.com/phan/phan/blob/v5/NEWS.md)
- [Commits](phan/phan@5.4.3...5.4.4)

---
updated-dependencies:
- dependency-name: phan/phan
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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