Nah, the article is trash. There is no law, ministries have been asked to come up with a plan of what's possible to do to switch but I highly doubt most will switch. The education ministry recently renewed it's Microsoft contract and I don't think there is anything enforcing a switch, it's only a "please look at what could be possible" thing. The only thing switching for sure is the DINUM, about 250 people, a lot of them already using Linux. But this is the start of an experiment where they are building some NixOS configurations that could be used if a larger switch was to happen.