Chore(deps-dev): Bump @nextcloud/stylelint-config from 2.3.0 to 2.3.1

Bumps [@nextcloud/stylelint-config](https://github.com/nextcloud/stylelint-config) from 2.3.0 to 2.3.1.
- [Release notes](https://github.com/nextcloud/stylelint-config/releases)
- [Changelog](https://github.com/nextcloud-libraries/stylelint-config/blob/master/CHANGELOG.md)
- [Commits](nextcloud-libraries/stylelint-config@v2.3.0...v2.3.1)

---
updated-dependencies:
- dependency-name: "@nextcloud/stylelint-config"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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