Correct git clone code in help file

Previous code was for users who had public keys set.

help/index.html

@@ -99,7 +99,7 @@ <h1 id="quickstart">Quick Start</h1>
             <h1 id="customization">Customization</h1> 
             <p>To modify a theme or create your own, follow the steps below in your terminal. You'll need to have <a href="https://help.github.com/articles/set-up-git" target="_blank">Git</a> and <a href="http://nodejs.org/" target="_blank">Node</a> installed.</p>
             <ol>
-              <li><p><code>git clone git@github.com:thomaspark/bootswatch.git</code></p></li>
+              <li><p><code>git clone https://github.com/thomaspark/bootswatch.git</code></p></li>
               <li><p><code>npm install</code></p></li>
               <li>
                 <p>Edit <code>variables.less</code> and <code>bootswatch.less</code> in one of the theme directories, or create your own in <code>/custom</code>.</p>
@@ -159,4 +159,4 @@ <h1 id="glyphsearch">GlyphSearch</h1>
       !function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs");
     </script>
   </body>
-</html>
+</html>