Bump stylelint-scss in the production-dependencies group (#476)

Bumps the production-dependencies group with 1 update: [stylelint-scss](https://github.com/stylelint-scss/stylelint-scss).


Updates `stylelint-scss` from 6.5.1 to 6.6.0
- [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@v6.5.1...v6.6.0)

---
updated-dependencies:
- dependency-name: stylelint-scss
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: production-dependencies
...

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