ti&m is just a privately owned consulting company
The github repo seems to be owned by the Kanton Bern (Canton of Bern) which is basically just one of the states within the federation. I hope not all of the cantons will have their own licenses and copy one that is approved by the federal government.
I just read the new law and there is the following legal text (translates from German by Deepl): „Internationally established license texts are to be used as far as possible and reasonable. Liability claims by licensees are to be excluded insofar as this is legally possible.“
So the law does not tell what license to use and could potentially change from project to project.