add info about translation

Author: nikolaev-dev

README.md

@@ -17,6 +17,7 @@ Spanish translation by _Jesus Gabriel y Galan_ & _Pablo García_
 Dutch translation by _Ivo Herweijer_  
 Brazilian Portuguese translation by [_Ricardo da Verdade Silva_](https://github.com/ricardovsilva)<br>
 Japanese translation by _Koji Shimada_ & _Masayoshi Takahashi_
+Russian translation by [_Alexander Nikolaev_](https://github.com/startaper)<br>
 
 Suggestions to improve translations are welcome.
 If you submit a pull request updating a translation please