Deps: Bump the python-packages group with 4 updates

Bumps the python-packages group with 4 updates: [pontos](https://github.com/greenbone/pontos), [black](https://github.com/psf/black), [httpx](https://github.com/encode/httpx) and [lxml](https://github.com/lxml/lxml).


Updates `pontos` from 23.12.3 to 23.12.4
- [Release notes](https://github.com/greenbone/pontos/releases)
- [Commits](greenbone/pontos@v23.12.3...v23.12.4)

Updates `black` from 23.12.0 to 23.12.1
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](psf/black@23.12.0...23.12.1)

Updates `httpx` from 0.25.2 to 0.26.0
- [Release notes](https://github.com/encode/httpx/releases)
- [Changelog](https://github.com/encode/httpx/blob/master/CHANGELOG.md)
- [Commits](encode/httpx@0.25.2...0.26.0)

Updates `lxml` from 4.9.3 to 5.0.0
- [Release notes](https://github.com/lxml/lxml/releases)
- [Changelog](https://github.com/lxml/lxml/blob/master/CHANGES.txt)
- [Commits](lxml/lxml@lxml-4.9.3...lxml-5.0.0)

---
updated-dependencies:
- dependency-name: pontos
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: python-packages
- dependency-name: black
  dependency-type: indirect
  update-type: version-update:semver-patch
  dependency-group: python-packages
- dependency-name: httpx
  dependency-type: indirect
  update-type: version-update:semver-minor
  dependency-group: python-packages
- dependency-name: lxml
  dependency-type: indirect
  update-type: version-update:semver-major
  dependency-group: python-packages
...

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