Add Ondrej Zima to translators

Change-Id: I733766385735858dc07a8c37d76d29457a8a35aa
diff --git a/CHANGELOG.mkdn b/CHANGELOG.mkdn
index cde779b..82c0832 100644
--- a/CHANGELOG.mkdn
+++ b/CHANGELOG.mkdn
@@ -73,6 +73,7 @@
 * Korean: Inseok Lee
 * Traditional Chinese: Ladios Jonquil
 * Slovak: Juraj Janecek
+* Czech: Ondrej Zima
 
 CHANGELOG
 ---------