Bump python-rapidjson from 1.22 to 1.23 in /flowmachine

Bumps [python-rapidjson](https://github.com/python-rapidjson/python-rapidjson) from 1.22 to 1.23.
- [Changelog](https://github.com/python-rapidjson/python-rapidjson/blob/master/CHANGES.rst)
- [Commits](python-rapidjson/python-rapidjson@v1.22...v1.23)

---
updated-dependencies:
- dependency-name: python-rapidjson
  dependency-version: '1.23'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]