Fix incorrect path in readme#components.js

The example code looks like it will glob the files in
app/assets/javascripts/components, but the paragraph says that it will
glob the files in app/assets/components. I believe that this is a
mistake, so this commit fixes this problem.

Author: lencioni

README.md

@@ -125,7 +125,7 @@ In order for us to render your React components, we need to be able to find them
 //= require_tree ./components
 ```
 
-This will bring in all files located in the `app/assets/components` directory.  You can organize your code however you like, as long as a request for `/assets/components.js` brings in a concatenated file containing all of your React components, and each one has to be available in the global scope (either `window` or `global` can be used). For `.js.jsx` files this is not a problem, but if you are using `.js.jsx.coffee` files then the wrapper function needs to be taken into account:
+This will bring in all files located in the `app/assets/javascripts/components` directory.  You can organize your code however you like, as long as a request for `/assets/components.js` brings in a concatenated file containing all of your React components, and each one has to be available in the global scope (either `window` or `global` can be used). For `.js.jsx` files this is not a problem, but if you are using `.js.jsx.coffee` files then the wrapper function needs to be taken into account:
 
 ```coffee
 ###* @jsx React.DOM ###