fix(github/workflows): fix msys2 ci (#252)
fix(github/workflows): fix msys2 ci (#252)

Shamelessly copied from https://github.com/leanprover/lean4/pull/141, thanks @kha!



fpvandoorn/lean,dselsam/lean,dselsam/lean,digama0/lean,fpvandoorn/lean,leanprover-community/lean,leanprover-community/lean,dselsam/lean,dselsam/lean,leanprover-community/lean,dselsam/lean,fpvandoorn/lean,digama0/lean,digama0/lean,dselsam/lean,leanprover-community/lean,fpvandoorn/lean,digama0/lean,leanprover-community/lean,digama0/lean,leanprover-community/lean,digama0/lean,fpvandoorn/lean,fpvandoorn/lean