Bump orjson from 3.9.2 to 3.9.15

Bumps [orjson](https://github.com/ijl/orjson) from 3.9.2 to 3.9.15.
- [Release notes](https://github.com/ijl/orjson/releases)
- [Changelog](https://github.com/ijl/orjson/blob/master/CHANGELOG.md)
- [Commits](ijl/orjson@3.9.2...3.9.15)

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

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

requirements.txt

@@ -21,7 +21,7 @@ itsdangerous==2.1.2
 Jinja2==3.1.2
 MarkupSafe==2.1.3
 more-itertools==7.2.0
-orjson==3.9.2
+orjson==3.9.15
 pycparser==2.21
 pydantic==1.9.2
 pydantic-settings==0.2.5