[PROOFREADING] min306 - vi

[Asi0Flammeus]

en PBN version: https://planb.academy/vi/courses/min306-57c6e89c-90ac-11f0-9427-13620e434184
en github version: https://github.com/PlanB-Network/bitcoin-educational-content/blob/dev/courses/min306/en.md
vi github version: https://github.com/PlanB-Network/bitcoin-educational-content/blob/dev/courses/min306/vi.md

[nphuly]

Working on it!

[nphuly]

Finished the proofreading, PR can be found here #4434