Chore: Fix broken conversation mailer layout (#825)

app/views/mailers/conversation_reply_mailer/reply_with_summary.html.erb

@@ -2,13 +2,14 @@
 
 <p>You have new messages on your conversation.</p>
 
-<table>
 <% @messages.each do |message| %>
   <tr>
     <td>
       <b><%= message.incoming? ? 'You' : message.user.name %></b>
     </td>
-      <td>:
+  </tr>
+  <tr>
+    <td style="padding-bottom: 16px;">
       <% if message.content %>
         <%= message.content %>
       <% end %>
@@ -20,4 +21,3 @@
     </td>
   </tr>
 <% end %>
-</table>