Update README.md

Author: lydiahallie

README.md

@@ -7,7 +7,7 @@ From basic to advanced: test how well you know JavaScript, refresh your knowledg
 The answers are in the collapsed sections below the questions, simply click on them to expand it. Good luck :heart:
 
 [中文版本](./README-zh_CN.md)  
-[Русский](./README_ru-RU.md)
+[Русский](./README_ru-RU.md)  
 [Western Balkan](./README-bs.md)
 
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