Bump ujson from 5.10.0 to 5.12.0

Bumps [ujson](https://github.com/ultrajson/ultrajson) from 5.10.0 to 5.12.0.
- [Release notes](https://github.com/ultrajson/ultrajson/releases)
- [Commits](ultrajson/ultrajson@5.10.0...5.12.0)

---
updated-dependencies:
- dependency-name: ujson
  dependency-version: 5.12.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]