fix link to translation

README.md

@@ -13,7 +13,7 @@
   <a href="#installation">Installation</a> •
   <a href="#customization">Customization</a> •
   <a href="#project-goals-and-alternatives">Project goals, alternatives</a> •
-  Translation [<a href="https://github.com/chinanf-boy/bat-zh">中文</a>][<a href="doc/README-ja.md">日本語</a>][<a href="doc/README-ko.md">한국어</a>][<a href="doc/README-ko.md">Русский</a>]
+  Translation [<a href="https://github.com/chinanf-boy/bat-zh">中文</a>][<a href="doc/README-ja.md">日本語</a>][<a href="doc/README-ko.md">한국어</a>][<a href="doc/README-ru.md">Русский</a>]
 </p>
 
 ### Syntax highlighting