Bump @testing-library/dom in /swift_browser_ui_frontend

Bumps [@testing-library/dom](https://github.com/testing-library/dom-testing-library) from 8.20.0 to 9.0.1.
- [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@v8.20.0...v9.0.1)

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

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

Author: dependabot[bot]

swift_browser_ui_frontend/package.json

@@ -49,7 +49,7 @@
     "vuex": "^3.6.2"
   },
   "devDependencies": {
-    "@testing-library/dom": "^8.20.0",
+    "@testing-library/dom": "^9.0.1",
     "@testing-library/jest-dom": "^5.16.5",
     "@testing-library/user-event": "^14.4.3",
     "@testing-library/vue": "^5.8.3",