_avatar.html.erb in milestoner-18.0.0

- old
+ new

@@ -1,5 +1,5 @@
 <% if name %>
   <img src="<%= url %>" alt="<%= name %>" class="avatar" width="24" height="24" loading="lazy">
 <% else %>
-  <%= render :icon, icon: "missing_avatar", kind: "Unknown" %>
+  <%= render :icon, name: "missing", alt: "Unknown" %>
 <% end %>