Bump frontend-maven-plugin from 1.10.3 to 1.12.0 in /frontend (#503)

Bumps [frontend-maven-plugin](https://github.com/eirslett/frontend-maven-plugin) from 1.10.3 to 1.12.0.
- [Release notes](https://github.com/eirslett/frontend-maven-plugin/releases)
- [Changelog](https://github.com/eirslett/frontend-maven-plugin/blob/master/CHANGELOG.md)
- [Commits](eirslett/frontend-maven-plugin@frontend-plugins-1.10.3...frontend-plugins-1.12.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

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