Bump sass from 1.27.0 to 1.28.0
Bump sass from 1.27.0 to 1.28.0

Bumps [sass](https://github.com/sass/dart-sass) from 1.27.0 to 1.28.0.
- [Release notes](https://github.com/sass/dart-sass/releases)
- [Changelog](https://github.com/sass/dart-sass/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sass/dart-sass/compare/1.27.0...1.28.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
textpattern/textpattern-forum,textpattern/textpattern-forum,textpattern/textpattern-forum