build(deps-dev): Bump @quasar/app from 3.1.0 to 3.1.2 in /frontend

Bumps [@quasar/app](https://github.com/quasarframework/quasar) from 3.1.0 to 3.1.2.
- [Release notes](https://github.com/quasarframework/quasar/releases)
- [Commits](https://github.com/quasarframework/quasar/compare/@quasar/app-v3.1.0...@quasar/app-v3.1.2)

---
updated-dependencies:
- dependency-name: "@quasar/app"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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