[five-or-more] Use a Unicode apostrophe in a user-visible string

[Piotr Drąg <piotrdrag src gnome org>]

commit 216a6d247f0b5f0a552b08f2441f73d8714d8479
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Thu Sep 13 17:32:05 2018 +0200

    Use a Unicode apostrophe in a user-visible string
    
    See https://developer.gnome.org/hig/stable/typography.html

 src/window.vala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/window.vala b/src/window.vala
index 6cc1824..d34712d 100644
--- a/src/window.vala
+++ b/src/window.vala
@@ -51,7 +51,7 @@ public class GameWindow : Gtk.ApplicationWindow
     private Games.Scores.Context highscores;
     private string[] status = {
             _("Match five objects of the same type in a row to score!"),
-            _("You can't move there!"),
+            _("You can’t move there!"),
             _("Game Over!"),
             null
     };