[gtk/included-icons: 6/7] stack demo: Use the proper icon name

[Matthias Clasen <matthiasc src gnome org>]

commit eb797f3d204036393d3007314bf559a9533fe413
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Feb 12 20:25:06 2019 -0500

    stack demo: Use the proper icon name
    
    The gtk-demo logo was renamed. Follow suit.

 demos/gtk-demo/stack.ui | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/demos/gtk-demo/stack.ui b/demos/gtk-demo/stack.ui
index d9b2aac44c..97565a9ba6 100644
--- a/demos/gtk-demo/stack.ui
+++ b/demos/gtk-demo/stack.ui
@@ -25,7 +25,7 @@
                   <object class="GtkImage">
                     <property name="margin-top">20</property>
                     <property name="margin-bottom">20</property>
-                    <property name="icon-name">gtk3-demo</property>
+                    <property name="icon-name">org.gtk.Demo</property>
                   </object>
                 </property>
               </object>