Updated browser_window (markdown)

browser-window.md

@@ -3,7 +3,7 @@
 The `BrowserWindow` class gives you ability to create a browser window, an example is:
 
 ```javascript
-var BrowserWindow = require('browser_window');
+var BrowserWindow = require('browser-window');
 
 var win = new BrowserWindow({ width: 800, height: 600, show: false });
 win.on('destroyed', function() {