build(deps-dev): bump css-loader from 3.6.0 to 4.0.0 in /html (#421)

build(deps-dev): bump css-loader from 3.6.0 to 4.0.0 in /html (#421)

Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 3.6.0 to 4.0.0.
- [Release notes](https://github.com/webpack-contrib/css-loader/releases)
- [Changelog](https://github.com/webpack-contrib/css-loader/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack-contrib/css-loader/compare/v3.6.0...v4.0.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>