Fix link in the docs

Author: Sander van Harmelen

website/source/layouts/cloudstack.erb

@@ -54,7 +54,7 @@
                         </li>
 
                         <li<%= sidebar_current("docs-cloudstack-resource-secondary-ipaddress") %>>
-                            <a href="/docs/providers/cloudstack/r/secondary_ipaddres.html">cloudstack_secondary_ipaddress</a>
+                            <a href="/docs/providers/cloudstack/r/secondary_ipaddress.html">cloudstack_secondary_ipaddress</a>
                         </li>
 
                         <li<%= sidebar_current("docs-cloudstack-resource-ssh-keypair") %>>