fix cz to cs language

Author: webvimark

messages/config.php

@@ -5,7 +5,7 @@
     'sourcePath' => __DIR__ . '/../',
     // array, required, list of language codes that the extracted messages
     // should be translated to. For example, ['zh-CN', 'de'].
-    'languages' => ['cz', 'de', 'ru','pt-BR','ko-KR', 'pt-PT'],
+    'languages' => ['cs', 'de', 'ru','pt-BR','ko-KR', 'pt-PT'],
     // string, the name of the function for translating messages.
     // Defaults to 'Yii::t'. This is used as a mark to find the messages to be
     // translated. You may use a string for single function name or an array for