Bump sea-orm from 0.12.3 to 0.12.4 in /deepwell

Bumps [sea-orm](https://github.com/SeaQL/sea-orm) from 0.12.3 to 0.12.4.
- [Release notes](https://github.com/SeaQL/sea-orm/releases)
- [Changelog](https://github.com/SeaQL/sea-orm/blob/master/CHANGELOG.md)
- [Commits](SeaQL/sea-orm@0.12.3...0.12.4)

---
updated-dependencies:
- dependency-name: sea-orm
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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