Fix howto link

assets_site/partials/websites/patterns/block-dropdown.html

@@ -13,5 +13,5 @@
   </div> -->
   <div><a class="button" href="{{@root.root}}files/building-blocks/{{datakey}}.zip">Download zip</a></div>
   <p>The zip contains the sample HTML and any spaecial CSS or JS needed to implement this pattern.</p>
-  <a class="small readmore" href="{{root}}websites/patterns/howto#use">More on how to use this</a>
+  <a class="small readmore" href="{{@root.root}}websites/patterns/howto#use">More on how to use this</a>
 </div>