Bump stylelint-scss from 3.5.3 to 3.5.4

Bumps [stylelint-scss](https://github.com/kristerkari/stylelint-scss) from 3.5.3 to 3.5.4.
- [Release notes](https://github.com/kristerkari/stylelint-scss/releases)
- [Changelog](https://github.com/kristerkari/stylelint-scss/blob/master/CHANGELOG.md)
- [Commits](https://github.com/kristerkari/stylelint-scss/compare/3.5.3...3.5.4

)

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