fix pet name in show template

Author: woylie

example/lib/nested_web/live/owner_live/show.html.leex

@@ -23,7 +23,7 @@
 <ul>
   <%= for pet <- @owner.pets do %>
     <li>
-      <strong>Name:</strong> <%= @owner.name %>,
+      <strong>Name:</strong> <%= pet.name %>,
       <strong>Toys:</strong> <%= pet.toys |> Enum.map(& &1.name) |> Enum.join(", ") %>
     </li>
   <% end %>