composer(deps-dev): bump vimeo/psalm in /tools/psalm

Bumps [vimeo/psalm](https://github.com/vimeo/psalm) from 4.13.1 to 4.15.0.
- [Release notes](https://github.com/vimeo/psalm/releases)
- [Commits](vimeo/psalm@4.13.1...v4.15.0)

---
updated-dependencies:
- dependency-name: vimeo/psalm
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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