[Help] How to update for MM Oficial?

I am here Stock WW- 2.20.40.194 L
I go simply download Android MM update and put internal memory? WW- 4.21.40.134 MM

Play in the internal memory and update ?

My bootloader is unlocked .
I don't have root
Oficial Recovery

Sorry bad English

Or before update for WW-2.20.40.196 and after WW-4.21.40.134??

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