Add russian translation

[ephys]

User kazmurenko from curseforge translated the mod to russian: https://www.curseforge.com/minecraft/mc-mods/magic-feather#c48

{
  "item.magicfeather.magicfeather": "Волшебное перо",
  "item.magicfeather.magicfeather.tooltip.out_of_beacon_range": "Должен быть в пределах диапазона радиомаяка"
}