Fixed typo. (electron#312)

Author: danieldbird

sections/windows/crash-hang.html

@@ -40,7 +40,7 @@ <h5>Renderer Process</h5>
             <button class="demo-button" id="process-hang">View Demo</button>
           </div>
           <p>In this demo we create a new window (via the <code>remote</code> module) and provide a link that will force the process to hang using <code>process.hang()</code>.</p>
-          <p>The window is listening for the process to become offcially unresponsive (this can take up to 30 seconds). When this event occurs it prompts the user with two options: reload or close.</p>
+          <p>The window is listening for the process to become officially unresponsive (this can take up to 30 seconds). When this event occurs it prompts the user with two options: reload or close.</p>
 
           <h5>Renderer Process</h5>
           <pre><code data-path="renderer-process/windows/process-hang.js"></code></pre>