Add link to Ukrainian translation

Author: igor-baluev

README.md

@@ -54,6 +54,7 @@ Translations are maintained by their creators and may not always be up to date w
 - [Romanian](http://vmazare.github.io/code-guide-romanian/) - Translated by [Valeriu Mazare](https://github.com/vmazare)
 - [Russian](http://sadcitizen.github.io/code-guide/) - Translated by [Eugene Abrosimov](https://github.com/sadcitizen)
 - [Traditional Chinese](https://codeguide.intersection.tw) - Translated by [Yuming Cheung](https://github.com/ymcheung)
+- [Ukrainian](https://igor-baluev.github.io/code-guide/) - Translated by [Igor Baluev](https://github.com/igor-baluev)
 
 Have a translation you'd like to link to? Open a pull request to add it here. Be sure to keep it alphabetical.