Bump @testing-library/dom from 9.3.1 to 9.3.4 in /ui (#1178)

Bumps [@testing-library/dom](https://github.com/testing-library/dom-testing-library) from 9.3.1 to 9.3.4.
- [Release notes](https://github.com/testing-library/dom-testing-library/releases)
- [Changelog](https://github.com/testing-library/dom-testing-library/blob/main/CHANGELOG.md)
- [Commits](testing-library/dom-testing-library@v9.3.1...v9.3.4)

---
updated-dependencies:
- dependency-name: "@testing-library/dom"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Max Saperstone <[email protected]>