Upgrade: Bump unified from 9.2.1 to 10.1.2

Bumps [unified](https://github.com/unifiedjs/unified) from 9.2.1 to 10.1.2.
- [Release notes](https://github.com/unifiedjs/unified/releases)
- [Changelog](https://github.com/unifiedjs/unified/blob/main/changelog.md)
- [Commits](unifiedjs/unified@9.2.1...10.1.2)

---
updated-dependencies:
- dependency-name: unified
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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