Bump ujson from 5.3.0 to 5.4.0

Bumps [ujson](https://github.com/ultrajson/ultrajson) from 5.3.0 to 5.4.0.
- [Release notes](https://github.com/ultrajson/ultrajson/releases)
- [Commits](ultrajson/ultrajson@5.3.0...5.4.0)

---
updated-dependencies:
- dependency-name: ujson
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>