Link-checked the README and fixed what is confirmed dead. Every dead URL was re-verified with curl (browser UA; NXDOMAIN double-checked via 8.8.8.8), and every replacement URL returns HTTP 200.

• https://api-platform.com/docs/client-generator/ → https://api-platform.com/docs/create-client/
  • Old URL returns HTTP 404; the Client Generator was renamed Create Client and its docs moved. Replacement returns 200 with title 'API Platform Create Client'.
• https://api-platform.com/docs/client-generator/nextjs/ → https://api-platform.com/docs/create-client/nextjs/
  • Old URL returns HTTP 404; docs moved under create-client. Replacement returns 200 with title 'Next.js Generator'.
• https://api-platform.com/docs/client-generator/nuxtjs/ → https://api-platform.com/docs/create-client/nuxt/
  • Old URL returns HTTP 404; the Nuxt generator docs now live at create-client/nuxt. Replacement returns 200 with title 'Nuxt Generator'.
• https://api-platform.com/docs/client-generator/react-native/ → https://api-platform.com/docs/create-client/react-native/
  • Old URL returns HTTP 404; docs moved under create-client. Replacement returns 200 with title 'React Native generator'.
• https://api-platform.com/docs/distribution/testing/ → https://api-platform.com/docs/symfony/testing/
  • Old URL returns HTTP 404; the distribution testing guide moved to the Symfony section. Replacement returns 200 with title 'Testing the API with Symfony' — same document.

Happy to adjust or split this if you'd prefer a different fix for any item.