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

[Andre Klapper <aklapper src gnome org>]

commit ba68432337f716d6bcfe8702663ca59729c13198
Author: Andre Klapper <a9016009 gmx de>
Date:   Fri Aug 27 12:10:37 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 a0aa99a..aa048d1 100644
--- a/help/cs/cs.po
+++ b/help/cs/cs.po
@@ -169,7 +169,7 @@ msgid ""
 "<gui>Action</gui>. This highlights the line."
 msgstr ""
 "V seznamu <gui style=\"group\">Ovládání</gui> vyberte řádek s požadovanou "
-"<gui>Činností</a>. Řádek se zvýrazní."
+"<gui>Činností</gui>. Řádek se zvýrazní."
 
 #. (itstool) path: item/p
 #: C/controls-change.page:58