build(deps): bump the dependecies group with 4 updates

Bumps the dependecies group with 4 updates: [@primer/css](https://github.com/primer/css), [autoprefixer](https://github.com/postcss/autoprefixer), [postcss](https://github.com/postcss/postcss) and [sass](https://github.com/sass/dart-sass).


Updates `@primer/css` from 21.0.7 to 21.0.8
- [Release notes](https://github.com/primer/css/releases)
- [Changelog](https://github.com/primer/css/blob/main/CHANGELOG.md)
- [Commits](primer/css@v21.0.7...v21.0.8)

Updates `autoprefixer` from 10.4.14 to 10.4.15
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/main/CHANGELOG.md)
- [Commits](postcss/autoprefixer@10.4.14...10.4.15)

Updates `postcss` from 8.4.27 to 8.4.28
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.27...8.4.28)

Updates `sass` from 1.64.2 to 1.66.1
- [Release notes](https://github.com/sass/dart-sass/releases)
- [Changelog](https://github.com/sass/dart-sass/blob/main/CHANGELOG.md)
- [Commits](sass/dart-sass@1.64.2...1.66.1)

---
updated-dependencies:
- dependency-name: "@primer/css"
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dependecies
- dependency-name: autoprefixer
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dependecies
- dependency-name: postcss
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dependecies
- dependency-name: sass
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dependecies
...

Signed-off-by: dependabot[bot] <[email protected]>