[gnome-chess] Fix broken markup in Czech help translation

[Andre Klapper <aklapper src gnome org>]

commit 5f2dd604219cff662b7096a8e6b7a43b67ebcab0
Author: Andre Klapper <a9016009 gmx de>
Date:   Fri Aug 27 12:10:05 2021 +0200

    Fix broken markup in Czech help translation

 help/cs/cs.po | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/help/cs/cs.po b/help/cs/cs.po
index ceca112..22affbc 100644
--- a/help/cs/cs.po
+++ b/help/cs/cs.po
@@ -569,7 +569,7 @@ msgid ""
 "Press the menu button in the top-right corner of the window and select <gui "
 "style=\"menuitem\">Save Game</gui>."
 msgstr ""
-"Zmáčkněte tlačítko nabídky v pravém horním rohu okna a vyberte <<gui style="
+"Zmáčkněte tlačítko nabídky v pravém horním rohu okna a vyberte <gui style="
 "\"menuitem\">Uložit hru</gui>."
 
 #. (itstool) path: item/p