Website: Change the link to AzureRM ScaleSets as the link was throwing a 404

Author: stack72

website/source/layouts/azurerm.erb

@@ -192,7 +192,7 @@
                 </li>
 
                 <li<%= sidebar_current("docs-azurerm-resource-virtualmachine-scalesets") %>>
-                  <a href="/docs/providers/azurerm/r/virtual_machine_scale_set.html">azurerm_virtual_machine_scale_set</a>
+                  <a href="/docs/providers/azurerm/r/virtual_machine_scale_sets.html">azurerm_virtual_machine_scale_set</a>
                 </li>
 
               </ul>