Changed "Cryllic" to "Cyrillic"

It's not such big change, but when using it, it's better to call it with appropriate name. Great work. 

Also one note, you are comparing Cyrillic alphabet letter "Ђ" with Cyrillic Non-Slavic letter "Ұ". I haven't looked is there such font that include one, and not another, but you can also use "у" with code \u0443 and have the same results. 

Once again, great work.