Bump ujson from 5.2.0 to 5.4.0 in /frameworks/Python/fastapi

Bumps [ujson](https://github.com/ultrajson/ultrajson) from 5.2.0 to 5.4.0.
- [Release notes](https://github.com/ultrajson/ultrajson/releases)
- [Commits](https://github.com/ultrajson/ultrajson/compare/5.2.0...5.4.0)

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

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

frameworks/Python/fastapi/requirements.txt

@@ -2,7 +2,7 @@ asyncpg==0.21.0
 gunicorn==20.0.4
 Jinja2==2.11.3
 markupsafe==2.0.1
-ujson==5.2.0
+ujson==5.4.0
 uvloop==0.14.0
 uvicorn==0.11.3
 fastapi==0.65.2