Bump sass from 1.20.1 to 1.20.3 (#10941)

Bumps [sass](https://github.com/sass/dart-sass) from 1.20.1 to 1.20.3.
- [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/1.20.1...1.20.3)