Bump sass-loader from 14.0.0 to 14.1.0 in /frontend

Bumps [sass-loader](https://github.com/webpack-contrib/sass-loader) from 14.0.0 to 14.1.0.
- [Release notes](https://github.com/webpack-contrib/sass-loader/releases)
- [Changelog](https://github.com/webpack-contrib/sass-loader/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/sass-loader@v14.0.0...v14.1.0)

---
updated-dependencies:
- dependency-name: sass-loader
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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