fix mobile menu margin

assets/sass/_theme/design-system/nav.sass

@@ -7,7 +7,6 @@
         opacity: 0
 
 .menu
-    
     @include media-breakpoint-down(desktop)
         -webkit-flex-basis: 100vw
         display: none
@@ -161,7 +160,7 @@
             padding-left: 0
 
         .nav-level-2
-            > .has-children + .has-children
+            > .has-children + li
                 margin-top: $spacing1
         .nav-level-3
             padding-top: 0