[ru] Update basics/enum.md to 1.5.0 (#2002)
[ru] Update basics/enum.md to 1.5.0 (#2002)

* [ru] Update basics/enum.md to 1.5.0

* [ru] Review translation for basics/enum.md

Co-Authored-By: Alexey Pyltsyn <2fdf8c46b9c02513a4efd78ae79467bd8249793a@gmail.com>

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