ot-br-posix commit mentioned in documentation does not exist:
https://infocenter.nordicsemi.com/topic/sdk_tz_v4.1.0/index.html?cp=7_3_0
https://github.com/openthread/ot-br-posix/commit/79ef99b911380c4ab8a7b29222a30f79d3c749fe
Please provide the correct commit sha.