Bump ujson from 5.7.0 to 5.12.0

Bumps [ujson](https://github.com/ultrajson/ultrajson) from 5.7.0 to 5.12.0.
- [Release notes](https://github.com/ultrajson/ultrajson/releases)
- [Commits](ultrajson/ultrajson@5.7.0...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]

requirements.txt

@@ -29,7 +29,7 @@ SQLAlchemy==1.4.47
 starlette==0.49.1
 typing==3.7.4.3
 typing_extensions==4.8.0
-ujson==5.7.0
+ujson==5.12.0
 urllib3==2.6.3
 uvicorn==0.21.1
 uvloop==0.17.0