Updated CDN URL (#377)

Author: jimaek

views/pages/customize.handlebars

@@ -67,7 +67,7 @@
                 </tr>
                 <tr>
                     <td><a href="http://www.jsdelivr.com/">jsDelivr</a></td>
-                    <td>//cdn.jsdelivr.net/pure/{{pure.version}}/pure-min.css</td>
+                    <td>//cdn.jsdelivr.net/npm/purecss@{{pure.version}}/build/pure-min.css</td>
                     <td>Yes</td>
                     <td>Yes</td>
                 </tr>