Bump yaml, stylelint, stylelint-config-recommended-scss and stylelint…

…-config-recommended

Removes [yaml](https://github.com/eemeli/yaml). It's no longer used after updating ancestor dependencies [yaml](https://github.com/eemeli/yaml), [stylelint](https://github.com/stylelint/stylelint), [stylelint-config-recommended-scss](https://github.com/stylelint-scss/stylelint-config-recommended-scss) and [stylelint-config-recommended](https://github.com/stylelint/stylelint-config-recommended). These dependencies need to be updated together.


Removes `yaml`

Updates `stylelint` from 14.16.1 to 15.6.0
- [Release notes](https://github.com/stylelint/stylelint/releases)
- [Changelog](https://github.com/stylelint/stylelint/blob/main/CHANGELOG.md)
- [Commits](stylelint/stylelint@14.16.1...15.6.0)

Updates `stylelint-config-recommended-scss` from 7.0.0 to 11.0.0
- [Release notes](https://github.com/stylelint-scss/stylelint-config-recommended-scss/releases)
- [Changelog](https://github.com/stylelint-scss/stylelint-config-recommended-scss/blob/master/CHANGELOG.md)
- [Commits](stylelint-scss/stylelint-config-recommended-scss@v7.0.0...v11.0.0)

Updates `stylelint-config-recommended` from 8.0.0 to 12.0.0
- [Release notes](https://github.com/stylelint/stylelint-config-recommended/releases)
- [Changelog](https://github.com/stylelint/stylelint-config-recommended/blob/main/CHANGELOG.md)
- [Commits](stylelint/stylelint-config-recommended@8.0.0...12.0.0)

---
updated-dependencies:
- dependency-name: yaml
  dependency-type: indirect
- dependency-name: stylelint
  dependency-type: direct:development
- dependency-name: stylelint-config-recommended-scss
  dependency-type: direct:development
- dependency-name: stylelint-config-recommended
  dependency-type: indirect
...

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