fix margins on mobile for sublandingpage header internal links

Author: Erik2609

layouts/partials/sublanding-page-header.html

@@ -35,7 +35,7 @@ <h3 class="{{$color}} font-size-1_3rem">{{.Params.title}}</h3>
         <div class="container pb-5">
           {{ range .Params.subpage_links }}
           <a href={{.url}} class="row justify-content-center">
-            <div style="background-color: {{.color}};" class="rounded-lg col color-blue p-0 m-2">
+            <div style="background-color: {{.color}};" class="rounded-lg col color-blue p-0 my-2">
               <div class="row mx-4 py-3">
                   <i class="font-size-1_5rem fa {{ .icon }}"></i>
                   <h3 class="color-blue font-size-1_5rem ml-4">{{.title}}</h3>