Deps: Bump the dependencies group across 1 directory with 5 updates

Bumps the dependencies group with 4 updates in the /backport-pull-request directory: [astroid](https://github.com/pylint-dev/astroid), [lxml](https://github.com/lxml/lxml), [platformdirs](https://github.com/platformdirs/platformdirs) and [tomlkit](https://github.com/sdispater/tomlkit).


Updates `astroid` from 3.1.0 to 3.2.2
- [Release notes](https://github.com/pylint-dev/astroid/releases)
- [Changelog](https://github.com/pylint-dev/astroid/blob/main/ChangeLog)
- [Commits](pylint-dev/astroid@v3.1.0...v3.2.2)

Updates `lxml` from 5.2.1 to 5.2.2
- [Release notes](https://github.com/lxml/lxml/releases)
- [Changelog](https://github.com/lxml/lxml/blob/master/CHANGES.txt)
- [Commits](lxml/lxml@lxml-5.2.1...lxml-5.2.2)

Updates `platformdirs` from 4.2.1 to 4.2.2
- [Release notes](https://github.com/platformdirs/platformdirs/releases)
- [Changelog](https://github.com/platformdirs/platformdirs/blob/main/CHANGES.rst)
- [Commits](tox-dev/platformdirs@4.2.1...4.2.2)

Updates `pylint` from 3.1.0 to 3.2.2
- [Release notes](https://github.com/pylint-dev/pylint/releases)
- [Commits](pylint-dev/pylint@v3.1.0...v3.2.2)

Updates `tomlkit` from 0.12.4 to 0.12.5
- [Release notes](https://github.com/sdispater/tomlkit/releases)
- [Changelog](https://github.com/python-poetry/tomlkit/blob/master/CHANGELOG.md)
- [Commits](python-poetry/tomlkit@0.12.4...0.12.5)

---
updated-dependencies:
- dependency-name: astroid
  dependency-type: indirect
  update-type: version-update:semver-minor
  dependency-group: dependencies
- dependency-name: lxml
  dependency-type: indirect
  update-type: version-update:semver-patch
  dependency-group: dependencies
- dependency-name: platformdirs
  dependency-type: indirect
  update-type: version-update:semver-patch
  dependency-group: dependencies
- dependency-name: pylint
  dependency-type: indirect
  update-type: version-update:semver-minor
  dependency-group: dependencies
- dependency-name: tomlkit
  dependency-type: indirect
  update-type: version-update:semver-patch
  dependency-group: dependencies
...

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