Added Russian language link

README.md

@@ -19,6 +19,7 @@ On other languages
 
   * [Chinese](https://github.com/MintCN/linux-insides-zh)
   * [Spanish](https://github.com/leolas95/linux-insides)
+  * [Russian](https://github.com/proninyaroslav/linux-insides-ru)
 
 LICENSE
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