Updated toc-dropdown margin-top

Author: jackycute

public/css/extra.css

@@ -106,7 +106,7 @@ h6:hover .header-link {
 }
 
 .ui-toc-dropdown {
-    margin-top: 20px;
+    margin-top: 23px;
     margin-bottom: 20px;
     padding-left: 10px;
     padding-right: 10px;