[gnome-tetravex] menus: Use Z for Size accelerator for disambiguation

[Jeremy Bicha <jbicha src gnome org>]

commit b1555c4a59441de26c2082a280e372a4876787f7
Author: Jeremy Bicha <jbicha ubuntu com>
Date:   Thu Dec 6 17:12:34 2018 -0500

    menus: Use Z for Size accelerator for disambiguation
    
    Scores uses S

 src/app-menu.ui | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/app-menu.ui b/src/app-menu.ui
index 1398020..6b50fc7 100644
--- a/src/app-menu.ui
+++ b/src/app-menu.ui
@@ -13,7 +13,7 @@
     </section>
     <section>
       <submenu>
-        <attribute name="label" translatable="yes">_Size</attribute>
+        <attribute name="label" translatable="yes">Si_ze</attribute>
         <section>
           <item>
             <attribute name="label" translatable="yes">_2x2</attribute>