[PROOFREADING] his203 - sw

[Asi0Flammeus]

en PBN version: https://planb.academy/sw/courses/his203-63f66c28-c9fa-11f0-a937-37b22ccf49e8
en github version: https://github.com/PlanB-Network/bitcoin-educational-content/blob/dev/courses/his203/en.md
sw github version: https://github.com/PlanB-Network/bitcoin-educational-content/blob/dev/courses/his203/sw.md

[Tinnah924]

Working on it