Update tip text for turning a card into a Golden Ticket

Clarified with JF after noticing language like "turning it into a Golden card" in the help content. We're okay with using "ticket" in this case.

Author: brian

app/views/cards/container/_gild.html.erb

@@ -6,6 +6,6 @@
 <% else %>
   <%= button_to card_goldness_path(card), class: "btn", data: { controller: "tooltip hotkey", action: "keydown.shift+g@document->hotkey#click" } do %>
     <%= icon_tag "golden-ticket" %>
-    <span class="for-screen-reader">Promote to golden (shift+g)</span>
+    <span class="for-screen-reader">Promote to Golden Ticket (shift+g)</span>
   <% end %>
 <% end %>