Bump stylelint-define-config from 1.5.0 to 1.6.0

Bumps [stylelint-define-config](https://github.com/stylelint-types/stylelint-define-config) from 1.5.0 to 1.6.0.
- [Release notes](https://github.com/stylelint-types/stylelint-define-config/releases)
- [Changelog](https://github.com/stylelint-types/stylelint-define-config/blob/main/CHANGELOG.md)
- [Commits](stylelint-types/stylelint-define-config@v1.5.0...v1.6.0)

---
updated-dependencies:
- dependency-name: stylelint-define-config
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>