Link to new React docs (#6763)

examples/framework-react/README.md

@@ -8,6 +8,6 @@ npm create astro@latest -- --template framework-react
 [![Open with CodeSandbox](https://assets.codesandbox.io/github/button-edit-lime.svg)](https://codesandbox.io/p/sandbox/github/withastro/astro/tree/latest/examples/framework-react)
 [![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)](https://codespaces.new/withastro/astro?devcontainer_path=.devcontainer/framework-react/devcontainer.json)
 
-This example showcases Astro working with [React](https://reactjs.org/).
+This example showcases Astro working with [React](https://react.dev).
 
 Write your React components as `.jsx` or `.tsx` files in your project.