Redmi 6 Russia Stable V11.0.5.0
OTA Apply for V11.0.4.0
https://bigota.d.miui.com/V11.0.5.0.PCGRUXM/miui-blockota-cereus_ru_global-V11.0.4.0.PCGRUXM-V11.0.5.0.PCGRUXM-63af2a6d15-9.0.zip
Recovery ROM
https://bigota.d.miui.com/V11.0.5.0.PCGRUXM/miui_HM6RUGlobal_V11.0.5.0.PCGRUXM_9be9598f94_9.0.zip
>>> All firmware: xiaomifirmware.net