Update dependency @testing-library/jest-dom to v6.6.4 (#743)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

app/react-app/package-lock.json

@@ -7,7 +7,7 @@
     "@mantine/core": "8.2.1",
     "@mantine/hooks": "8.2.1",
     "@tabler/icons-react": "3.34.1",
-    "@testing-library/jest-dom": "6.6.3",
+    "@testing-library/jest-dom": "6.6.4",
     "@testing-library/react": "16.3.0",
     "@testing-library/user-event": "14.6.1",
     "@types/jest": "30.0.0",