build(deps-dev): bump @testing-library/jest-dom in /frontend

Bumps [@testing-library/jest-dom](https://github.com/testing-library/jest-dom) from 6.4.2 to 6.4.8.
- [Release notes](https://github.com/testing-library/jest-dom/releases)
- [Changelog](https://github.com/testing-library/jest-dom/blob/main/CHANGELOG.md)
- [Commits](testing-library/jest-dom@v6.4.2...v6.4.8)

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

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

frontend/package.json

@@ -48,7 +48,7 @@
   "devDependencies": {
     "@tailwindcss/typography": "0.5.12",
     "@testing-library/dom": "10.4.0",
-    "@testing-library/jest-dom": "6.4.2",
+    "@testing-library/jest-dom": "6.4.8",
     "@testing-library/react": "15.0.1",
     "@trivago/prettier-plugin-sort-imports": "4.3.0",
     "@types/jest": "29.5.12",