docs: add link to russian translation to readme

[24367dfa]

closes #2112

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.15%. Comparing base (7b755a3) to head (b678fa6).
Report is 207 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2142   +/-   ##
=======================================
  Coverage   74.15%   74.15%           
=======================================
  Files           7        7           
  Lines         561      561           
=======================================
  Hits          416      416           
  Misses        113      113           
  Partials       32       32           

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[jhaals]

Thanks!