chore(ui-deps): bump @testing-library/jest-dom in /llama_stack/ui

Bumps [@testing-library/jest-dom](https://github.com/testing-library/jest-dom) from 6.6.3 to 6.8.0.
- [Release notes](https://github.com/testing-library/jest-dom/releases)
- [Changelog](https://github.com/testing-library/jest-dom/blob/main/CHANGELOG.md)
- [Commits](https://github.com/testing-library/jest-dom/compare/v6.6.3...v6.8.0)

---
updated-dependencies:
- dependency-name: "@testing-library/jest-dom"
  dependency-version: 6.8.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

llama_stack/ui/package.json

@@ -41,7 +41,7 @@
     "@eslint/eslintrc": "^3",
     "@tailwindcss/postcss": "^4",
     "@testing-library/dom": "^10.4.1",
-    "@testing-library/jest-dom": "^6.6.3",
+    "@testing-library/jest-dom": "^6.8.0",
     "@testing-library/react": "^16.3.0",
     "@types/jest": "^29.5.14",
     "@types/node": "^20",