This PR bumps react-native to 0.85.3 in performance-tests/TestAppPlain/package.json, but the engines.node constraint is still ">=18". React Native v0.84.0 raised the minimum Node.js version to v22.11 (per the changelog in the PR description). For consistency with samples/react-native/package.json — which is updated in the same PR to "node": ">=22.11.0" — consider bumping the engines field here as well so the declared Node requirement matches what RN 0.85 actually supports.