[four-in-a-row] help: Replace title bar with header bar

[Andre Klapper <aklapper src gnome org>]

commit 4181d8e369615ab49b90512cf8de99f3e6bfb6f5
Author: Andre Klapper <a9016009 gmx de>
Date:   Wed Jan 30 14:25:41 2019 -0800

    help: Replace title bar with header bar

 help/C/make-easy.page | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/help/C/make-easy.page b/help/C/make-easy.page
index 5f75e7d..6a3d3a4 100644
--- a/help/C/make-easy.page
+++ b/help/C/make-easy.page
@@ -27,7 +27,7 @@
   <p>When the computer makes a winning move because of your last move or when
   you accidentally make the wrong move, you can undo your last move and change
   it. To undo your last move, press the <gui style="button">Undo your most recent
-  move</gui> button in the title bar or press
+  move</gui> button in the header bar or press
   <keyseq><key>Ctrl</key><key>Z</key></keyseq>. You can now drop your marble at
   a different row in the game area to change your move.</p>