Bump @mikro-orm/migrations from 5.7.13 to 6.3.8

Bumps [@mikro-orm/migrations](https://github.com/mikro-orm/mikro-orm) from 5.7.13 to 6.3.8.
- [Release notes](https://github.com/mikro-orm/mikro-orm/releases)
- [Changelog](https://github.com/mikro-orm/mikro-orm/blob/master/CHANGELOG.md)
- [Commits](mikro-orm/mikro-orm@v5.7.13...v6.3.8)

---
updated-dependencies:
- dependency-name: "@mikro-orm/migrations"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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