Update ru_ru

[Quarkrus]

Corrected russian translate to latest 1.20 version

[Heimdallr-1]

You wasted your time on the translation. He didn’t accept mine either, and I recently noticed some mistakes in my translation and someone else’s. Both mine and the other one were rejected. So, it’s unlikely he’ll accept yours.

[mickelus]

Sorry for the massive snooze, I've rebased this on top of the 1.20 branch and merged it. Thank you for helping out!