Fixed documentation link for storybook in README.md (facebook#2081)

Author: Scott Ranger

packages/react-scripts/template/README.md

@@ -1199,7 +1199,7 @@ Learn more about React Storybook:
 
 * Screencast: [Getting Started with React Storybook](https://egghead.io/lessons/react-getting-started-with-react-storybook)
 * [GitHub Repo](https://github.com/kadirahq/react-storybook)
-* [Documentation](https://getstorybook.io/docs)
+* [Documentation](https://storybooks.js.org/docs/react-storybook/basics/introduction/)
 * [Snapshot Testing](https://github.com/kadirahq/storyshots) with React Storybook
 
 ## Making a Progressive Web App