chore(deps): bump orjson from 3.9.7 to 3.9.15

Bumps [orjson](https://github.com/ijl/orjson) from 3.9.7 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@3.9.7...3.9.15)

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

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

requirements.txt

@@ -35,7 +35,7 @@ idna==3.4
     #   httpx
 marshmallow==3.20.1
     # via -r requirements.in
-orjson==3.9.7
+orjson==3.9.15
     # via -r requirements.in
 packaging==23.1
     # via marshmallow