[gnome-boxes] Updated Czech translation

[Marek Černocký <mcernocky src gnome org>]

commit a9738a5de0ed4a8ba7e7800fdb88e86e04de50e2
Author: Marek Cernocky <marek_cernocky conel cz>
Date:   Mon Apr 9 09:46:34 2018 +0200

    Updated Czech translation

 po/cs.po | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/po/cs.po b/po/cs.po
index e75f2ae0..72afe70d 100644
--- a/po/cs.po
+++ b/po/cs.po
@@ -823,7 +823,7 @@ msgstr ""
 
 #: src/libvirt-machine-properties.vala:485
 msgid "Maximum _Disk Size: "
-msgstr "Maximální velikost _disku:"
+msgstr "Maximální velikost _disku: "
 
 #. qemu-img doesn't support resizing disk image with snapshots:
 #. https://bugs.launchpad.net/qemu/+bug/1563931