fix(locales): updated Russian translation

Currently translated at 100.0% (157 of 157 strings)

Co-authored-by: Максим Татаров <maxtet.dev@gmail.com>
Translate-URL: https://translate-h5p.tk/weblate/projects/lumi-education/lumi-app/ru/
Translation: Lumi Education/Lumi App

Co-authored-by: Weblate <noreply@weblate.org>
Co-authored-by: Максим Татаров <maxtet.dev@gmail.com>