Bump orjson from 3.9.2 to 3.9.4 (#3622)

Bumps [orjson](https://github.com/ijl/orjson) from 3.9.2 to 3.9.4.
- [Release notes](https://github.com/ijl/orjson/releases)
- [Changelog](https://github.com/ijl/orjson/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ijl/orjson/compare/3.9.2...3.9.4)

---
updated-dependencies:
- dependency-name: orjson
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -10,7 +10,7 @@ mercurial==6.5.1
 microannotate==0.0.24
 mozci==2.3.2
 numpy==1.22.4
-orjson==3.9.2
+orjson==3.9.4
 ortools==9.6.2534
 pandas==2.0.3
 psutil==5.9.5