Update link to SDK landing page

Author: amarantha-k

src/partials/header-content.hbs

@@ -40,7 +40,7 @@
                     </a>
                   </li>
                   <li class="nav-item">
-                    <a class="nav-link" href="{{relativize (resolvePageURL 'server:sdk:overview.adoc')}}">
+                    <a class="nav-link" href="{{relativize (resolvePageURL 'home::sdk.adoc')}}">
                       SDKs
                     </a>
                   </li>