Fix "usage" title in README

kasbah · web-flow · commit a8e726c14839 · 2017-10-04T22:43:45.000+01:00
diff --git a/README.md b/README.md
@@ -4,7 +4,7 @@
 
 Mouse Backend for React Drag and Drop library http://gaearon.github.io/react-dnd
 
-### Usage
+### Usage
 
 ```js
 import { DragDropContext } from 'react-dnd'
