Deps: Bump the python-packages group with 3 updates

Bumps the python-packages group with 3 updates: [mypy](https://github.com/python/mypy), [coverage](https://github.com/nedbat/coveragepy) and [anyio](https://github.com/agronholm/anyio).


Updates `mypy` from 1.11.2 to 1.12.1
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.11.2...v1.12.1)

Updates `coverage` from 7.6.3 to 7.6.4
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@7.6.3...7.6.4)

Updates `anyio` from 4.6.2 to 4.6.2.post1
- [Release notes](https://github.com/agronholm/anyio/releases)
- [Changelog](https://github.com/agronholm/anyio/blob/master/docs/versionhistory.rst)
- [Commits](agronholm/anyio@4.6.2...4.6.2.post1)

---
updated-dependencies:
- dependency-name: mypy
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: python-packages
- dependency-name: coverage
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: python-packages
- dependency-name: anyio
  dependency-type: indirect
  update-type: version-update:semver-patch
  dependency-group: python-packages
...

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