Deps: Bump the python-packages group with 3 updates

Bumps the python-packages group with 3 updates: [coverage](https://github.com/nedbat/coveragepy), [httpcore](https://github.com/encode/httpcore) and [tomli](https://github.com/hukkin/tomli).


Updates `coverage` from 7.6.4 to 7.6.7
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@7.6.4...7.6.7)

Updates `httpcore` from 1.0.6 to 1.0.7
- [Release notes](https://github.com/encode/httpcore/releases)
- [Changelog](https://github.com/encode/httpcore/blob/master/CHANGELOG.md)
- [Commits](encode/httpcore@1.0.6...1.0.7)

Updates `tomli` from 2.0.2 to 2.1.0
- [Changelog](https://github.com/hukkin/tomli/blob/master/CHANGELOG.md)
- [Commits](hukkin/tomli@2.0.2...2.1.0)

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

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