Make links to docs consistent in README (facebook#6000)

Author: iansu

README.md

@@ -3,7 +3,7 @@
 Create React apps with no build configuration.
 
 - [Creating an App](#creating-an-app) – How to create a new app.
-- [User Guide](https://facebook.github.io/create-react-app/docs/folder-structure) – How to develop apps bootstrapped with Create React App.
+- [User Guide](https://facebook.github.io/create-react-app/) – How to develop apps bootstrapped with Create React App.
 
 Create React App works on macOS, Windows, and Linux.<br>
 If something doesn’t work, please [file an issue](https://github.com/facebook/create-react-app/issues/new).