Fix typo in System section (electron#309)

Author: Johnnycus

sections/system/app-sys-information.html

@@ -51,7 +51,7 @@ <h5>Renderer Process</h5>
           <div class="demo-protip">
             <h2>ProTip</h2>
             <strong>Find versions of Chromium, Node.js and V8.</strong>
-            <p>Electron also includes verions of Chromium, Node.js and V8 within the <code>process.versions</code> object. You can get there quickly by opening up developer tools in an Electron app and typing <code>process.versions</code>.</p>
+            <p>Electron also includes versions of Chromium, Node.js and V8 within the <code>process.versions</code> object. You can get there quickly by opening up developer tools in an Electron app and typing <code>process.versions</code>.</p>
             <pre><code class="language-js">// Returns version of Chromium in use
 process.versions.chrome
 // Returns version of V8 in use