fix xref syntax for landing pages

Author: amarantha-k

src/partials/header-content.hbs

@@ -16,22 +16,22 @@
     <div class="navbar-collapse collapse" id="navbar2">
       <ul class="navbar-nav w-100 justify-content-start">
         <li class="nav-item active">
-          <a class="nav-link" href="{{relativize (resolvePageURL 'home:server.adoc')}}">
+          <a class="nav-link" href="{{relativize (resolvePageURL 'home::server.adoc')}}">
             Server
           </a>
         </li>
         <li class="nav-item">
-          <a class="nav-link" href="{{relativize (resolvePageURL 'home:mobile.adoc')}}">
+          <a class="nav-link" href="{{relativize (resolvePageURL 'home::mobile.adoc')}}">
             Mobile
           </a>
         </li>
         <li class="nav-item">
-          <a class="nav-link" href="{{relativize (resolvePageURL 'home:cloud.adoc')}}">
+          <a class="nav-link" href="{{relativize (resolvePageURL 'home::cloud.adoc')}}">
             Cloud
           </a>
         </li>
         <li class="nav-item">
-          <a class="nav-link" href="{{relativize (resolvePageURL 'home:integrations.adoc')}}">
+          <a class="nav-link" href="{{relativize (resolvePageURL 'home::integrations.adoc')}}">
             Integration
           </a>
         </li>