Deps: Bump the python-packages group with 2 updates

Bumps the python-packages group with 2 updates: [anyio](https://github.com/agronholm/anyio) and [black](https://github.com/psf/black).


Updates `anyio` from 3.7.1 to 4.0.0
- [Release notes](https://github.com/agronholm/anyio/releases)
- [Changelog](https://github.com/agronholm/anyio/blob/master/docs/versionhistory.rst)
- [Commits](agronholm/anyio@3.7.1...4.0.0)

Updates `black` from 23.7.0 to 23.9.1
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](psf/black@23.7.0...23.9.1)

---
updated-dependencies:
- dependency-name: anyio
  dependency-type: indirect
  update-type: version-update:semver-major
  dependency-group: python-packages
- dependency-name: black
  dependency-type: indirect
  update-type: version-update:semver-minor
  dependency-group: python-packages
...

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