[gnome-games] ui: Fix typo in a translatable string in the shortcuts window

[Piotr Drąg <piotrdrag src gnome org>]

commit c1d74fbcc19bf4c75d7005e0e944dfd63d67d2da
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sun Jun 24 19:05:06 2018 +0200

    ui: Fix typo in a translatable string in the shortcuts window

 data/ui/shortcuts-window.ui | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/data/ui/shortcuts-window.ui b/data/ui/shortcuts-window.ui
index cd3074d..bca48c7 100644
--- a/data/ui/shortcuts-window.ui
+++ b/data/ui/shortcuts-window.ui
@@ -46,7 +46,7 @@
             <child>
               <object class="GtkShortcutsShortcut">
                 <property name="visible">True</property>
-                <property name="title" translatable="yes" context="shortcut window">Toggle 
ullscreen</property>
+                <property name="title" translatable="yes" context="shortcut window">Toggle 
fullscreen</property>
                 <property name="accelerator">&lt;Primary&gt;F F11</property>
               </object>
             </child>