Bump @mikro-orm/postgresql from 5.9.5 to 5.9.7 in /api

Bumps [@mikro-orm/postgresql](https://github.com/mikro-orm/mikro-orm) from 5.9.5 to 5.9.7.
- [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@v5.9.5...v5.9.7)

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

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