Bump stylelint-scss from 4.7.0 to 6.12.1

Bumps [stylelint-scss](https://github.com/stylelint-scss/stylelint-scss) from 4.7.0 to 6.12.1.
- [Release notes](https://github.com/stylelint-scss/stylelint-scss/releases)
- [Changelog](https://github.com/stylelint-scss/stylelint-scss/blob/master/CHANGELOG.md)
- [Commits](stylelint-scss/stylelint-scss@v4.7.0...v6.12.1)

---
updated-dependencies:
- dependency-name: stylelint-scss
  dependency-version: 6.12.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Author: dependabot[bot]