Bump yaml, stylelint and stylelint-config-standard-scss

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) and [stylelint-config-standard-scss](https://github.com/stylelint-scss/stylelint-config-standard-scss). These dependencies need to be updated together.


Removes `yaml`

Updates `stylelint` from 14.1.0 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@14.1.0...15.6.0)

Updates `stylelint-config-standard-scss` from 3.0.0 to 9.0.0
- [Release notes](https://github.com/stylelint-scss/stylelint-config-standard-scss/releases)
- [Changelog](https://github.com/stylelint-scss/stylelint-config-standard-scss/blob/main/CHANGELOG.md)
- [Commits](stylelint-scss/stylelint-config-standard-scss@v3.0.0...v9.0.0)

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

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

Author: dependabot[bot]