fix link urls

lms/templates/navigation.html

@@ -40,7 +40,7 @@ site_status_msg = get_site_status_msg(course_id)
   <nav>
 
     <h1 class="logo">
-      <a href="${marketing_link('ROOT')}">
+      <a href="/">
         <%block name="navigation_logo">
           <img src="${static.url(branding.get_logo_url(request.META.get('HTTP_HOST')))}"/>
         </%block>
@@ -57,7 +57,7 @@ site_status_msg = get_site_status_msg(course_id)
       <%block name="custom_nav_login"/>
       
       <li class="nav-global-01">
-      <a href="${marketing_link('COURSES')}">Find Courses</a>
+      <a href="${reverse('courses')}">Find Courses</a>
       </li>
     </ol>
     <ol class="user">