Bump bref/bref from 2.1.21 to 2.2.1

Bumps [bref/bref](https://github.com/brefphp/bref) from 2.1.21 to 2.2.1.
- [Release notes](https://github.com/brefphp/bref/releases)
- [Commits](brefphp/bref@2.1.21...2.2.1)

---
updated-dependencies:
- dependency-name: bref/bref
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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