ui: bump @vue/test-utils from 2.4.5 to 2.4.6 in /ui

Bumps [@vue/test-utils](https://github.com/vuejs/test-utils) from 2.4.5 to 2.4.6.
- [Release notes](https://github.com/vuejs/test-utils/releases)
- [Commits](vuejs/test-utils@v2.4.5...v2.4.6)

---
updated-dependencies:
- dependency-name: "@vue/test-utils"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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