build(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] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -16,7 +16,7 @@ itsdangerous==2.1.2
 Jinja2==3.1.3
 MarkupSafe==2.1.3
 num2words==0.5.12
-orjson==3.9.7
+orjson==3.9.15
 paho-mqtt==1.6.1
 pydantic==2.3.0
 pydantic-extra-types==2.1.0