Add link to eng styleguide

Author: Melevir

README.md

@@ -64,7 +64,6 @@ Here are useful tips:
 
 - You can run all checks and tests with `make check`.
   Please do it before TravisCI does.
-- We use [BestDoctor python styleguide](https://github.com/best-doctor/guides/blob/master/guides/python_styleguide.md).
-  Sorry, styleguide is available only in Russian for now.
+- We use [BestDoctor python styleguide](https://github.com/best-doctor/guides/blob/master/guides/en/python_styleguide.md).
 - We respect [Django CoC](https://www.djangoproject.com/conduct/).
   Make soft, not bullshit.