adjust email templates

app/views/submit_form/completed.html.erb

@@ -1,4 +1,4 @@
-<div class="max-w-md mx-auto px-2 mt-12">
+<div class="max-w-md mx-auto px-2 mt-12 mb-4">
   <div class="space-y-6 mx-auto">
     <div class="space-y-6">
       <div class="flex items-center justify-center">
@@ -42,3 +42,4 @@
     </div>
   </div>
 </div>
+<%= render 'shared/attribution' %>

app/views/submit_form/show.html.erb

@@ -23,10 +23,7 @@
       </div>
     <% end %>
   <% end %>
-  <div class="text-center px-2">
-    Powered by
-    <a href="https://www.docuseal.co" class="underline">DocuSeal</a> - open source documents software
-  </div>
+  <%= render 'shared/attribution' %>
 </div>
 <div class="fixed bottom-0 w-full h-0 z-20">
   <div class="mx-auto" style="max-width: 1000px">