[PROOFREADING] his201 - vi

[Asi0Flammeus]

en PBN version: https://planb.academy/vi/courses/his201-a51c7ceb-e079-4ac3-bf69-6700b985a082
en github version: https://github.com/PlanB-Network/bitcoin-educational-content/blob/dev/courses/his201/en.md
vi github version: https://github.com/PlanB-Network/bitcoin-educational-content/blob/dev/courses/his201/vi.md

[nphuly]

Working on it!

[nphuly]

Finished proofreading with PR #4464