Bump node-sass from 4.14.0 to 4.14.1 in /build

Bumps [node-sass](https://github.com/sass/node-sass) from 4.14.0 to 4.14.1.
- [Release notes](https://github.com/sass/node-sass/releases)
- [Changelog](https://github.com/sass/node-sass/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sass/node-sass/compare/v4.14.0...v4.14.1

)

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