Bump doctrine/orm from 2.9.1 to 2.9.4 (#504)

Bumps [doctrine/orm](https://github.com/doctrine/orm) from 2.9.1 to 2.9.4.
- [Release notes](https://github.com/doctrine/orm/releases)
- [Commits](doctrine/orm@2.9.1...2.9.4)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>