fix(core): update

material/partials/tabs.html

@@ -0,0 +1,13 @@
+{% set class = "md-tabs" %}
+{% if page.ancestors | length > 0 %}
+  {% set class = "md-tabs md-tabs--active" %}
+{% endif %}
+<nav class="{{ class }}" data-md-component="tabs">
+  <div class="md-tabs__inner md-grid">
+    <ul class="md-tabs__list">
+      {% for nav_item in nav %}
+        {% include "partials/tabs-item.html" %}
+      {% endfor %}
+    </ul>
+  </div>
+</nav>