Bump orjson from 3.8.7 to 3.9.15 in /envs

Bumps [orjson](https://github.com/ijl/orjson) from 3.8.7 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@3.8.7...3.9.15)

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

Signed-off-by: dependabot[bot] <support@github.com>

envs/dreambooth_requirements.txt

@@ -78,7 +78,7 @@ ninja==1.11.1
 numpy @ file:///croot/numpy_and_numpy_base_1672336185480/work
 omidb==0.7.0
 opencv-python==4.7.0.72
-orjson==3.8.7
+orjson==3.9.15
 packaging==23.0
 pandas==1.5.3
 parso==0.8.3