Sending skip links to single main, making more relevant

themes/edx.org/lms/templates/dashboard.html

@@ -20,7 +20,6 @@ from openedx.core.djangolib.js_utils import dump_js_escaped_json, js_escaped_str
 
 <%block name="pagetitle">${_("Dashboard")}</%block>
 <%block name="bodyclass">view-dashboard is-authenticated</%block>
-<%block name="nav_skip">#my-courses</%block>
 
 <%block name="header_extras">
 % for template_name in ["donation"]:
@@ -77,7 +76,8 @@ from openedx.core.djangolib.js_utils import dump_js_escaped_json, js_escaped_str
 </div>
 
 <section class="container dashboard" id="dashboard-main">
-  <section class="my-courses" id="my-courses" role="main" aria-label="Content" tabindex="-1">
+<main id="main" aria-label="Content" tabindex="-1">
+  <section class="my-courses" id="my-courses">
     <header class="wrapper-header-courses">
       <h2 class="header-courses">${_("My Courses")}</h2>
     </header>
@@ -132,6 +132,7 @@ from openedx.core.djangolib.js_utils import dump_js_escaped_json, js_escaped_str
       </div>
     % endif
   </section>
+</main>
 
   % if settings.FEATURES.get('ENABLE_DASHBOARD_SEARCH'):
     <div id="dashboard-search-bar" class="search-bar dashboard-search-bar" role="search" aria-label="Dashboard">