chore(deps-dev): bump @vue/cli-service from 3.7.0 to 3.8.0 in /frontend (filebrowser#767)

Bumps [@vue/cli-service](https://github.com/vuejs/vue-cli/tree/HEAD/packages/@vue/cli-service) from 3.7.0 to 3.8.0.
- [Release notes](https://github.com/vuejs/vue-cli/releases)
- [Changelog](https://github.com/vuejs/vue-cli/blob/dev/CHANGELOG.md)
- [Commits](https://github.com/vuejs/vue-cli/commits/v3.8.0/packages/@vue/cli-service)

Author: dependabot-preview[bot]