sorted <link> attributes for uniformity

Closes #5341

src/get-started.html

@@ -27,7 +27,7 @@ relative_path: ../
       <li>
         Paste the following code into the <code>&lt;head&gt;</code> section of your site's HTML.
 {% highlight html %}
-<link href="//maxcdn.bootstrapcdn.com/font-awesome/{{ site.fontawesome.version }}/css/font-awesome.min.css" rel="stylesheet">
+<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/font-awesome/{{ site.fontawesome.version }}/css/font-awesome.min.css">
 {% endhighlight %}
         <p class="alert alert-success"><i class="fa fa-info-circle"></i> Immediately after release, it takes a bit of time for BootstrapCDN to catch up and get the newest version live on their CDN.</p>
       </li>