build(deps-dev): bump @testing-library/jest-dom from 6.6.4 to 6.8.0 in /frontend (#4949)

Author: sandhose

frontend/package-lock.json

@@ -52,7 +52,7 @@
     "@tanstack/react-query-devtools": "^5.85.5",
     "@tanstack/react-router-devtools": "^1.131.27",
     "@tanstack/router-plugin": "^1.131.27",
-    "@testing-library/jest-dom": "^6.6.4",
+    "@testing-library/jest-dom": "^6.8.0",
     "@testing-library/react": "^16.3.0",
     "@testing-library/user-event": "^14.6.1",
     "@types/node": "^24.3.0",