Fixed course update css to match changed tags

lms/static/sass/course/_info.scss

@@ -12,15 +12,15 @@ div.info-wrapper {
       margin-bottom: lh();
     }
 
-    > ol {
+    > ol,section {
       list-style: none;
       margin-bottom: lh();
       padding-left: 0;
 
-      > li {
+      > li,article {
         @extend .clearfix;
         border-bottom: 1px solid lighten($border-color, 10%);
-        list-style-type: disk;
+        list-style-type: none;
         margin-bottom: lh(1.5);
         padding-bottom: lh(.75);