doc(make/msys2): update instructions
doc(make/msys2): update instructions

leanprover-community/lean,leodemoura/lean,johoelzl/lean,avigad/lean,fgdorais/lean,Kha/lean,javra/lean,leanprover-community/lean,leodemoura/lean,fgdorais/lean,rlewis1988/lean,fpvandoorn/lean,levnach/lean,fgdorais/lean,rlewis1988/lean,dselsam/lean,Kha/lean,c-cube/lean,leanprover/lean,dselsam/lean,rlewis1988/lean,eigengrau/lean,UlrikBuchholtz/lean,digama0/lean,johoelzl/lean,soonhokong/lean,htzh/lean,javra/lean,leanprover-community/lean,sp3ctum/lean,fpvandoorn/lean,leanprover-community/lean,c-cube/lean,soonhokong/lean-windows,javra/lean,fpvandoorn/lean2,c-cube/lean,johoelzl/lean,avigad/lean,fpvandoorn/lean2,fgdorais/lean,avigad/lean,fpvandoorn/lean2,leodemoura/lean,avigad/lean,levnach/lean,UlrikBuchholtz/lean,avigad/lean,htzh/lean,fgdorais/lean,fpvandoorn/lean2,dselsam/lean,Kha/lean,javra/lean,htzh/lean,soonhokong/lean,soonhokong/lean-osx,johoelzl/lean,soonhokong/lean-osx,digama0/lean,eigengrau/lean,fgdorais/lean,leanprover/lean,soonhokong/lean,Kha/lean,c-cube/lean,leanprover/lean,soonhokong/lean,eigengrau/lean,javra/lean,digama0/lean,leanprover/lean,htzh/lean,c-cube/lean,dselsam/lean,rlewis1988/lean,leanprover-community/lean,leanprover/lean,UlrikBuchholtz/lean,Kha/lean,leanprover/lean,soonhokong/lean-windows,Kha/lean,soonhokong/lean-windows,fpvandoorn/lean,eigengrau/lean,leanprover-community/lean,sp3ctum/lean,levnach/lean,htzh/lean,UlrikBuchholtz/lean,digama0/lean,soonhokong/lean-osx,soonhokong/lean-windows,levnach/lean,sp3ctum/lean,digama0/lean,soonhokong/lean-osx,soonhokong/lean-windows,UlrikBuchholtz/lean,leodemoura/lean,eigengrau/lean,digama0/lean,sp3ctum/lean,rlewis1988/lean,johoelzl/lean,soonhokong/lean-osx,rlewis1988/lean,soonhokong/lean,fpvandoorn/lean,fpvandoorn/lean,dselsam/lean,fpvandoorn/lean,johoelzl/lean,dselsam/lean,avigad/lean,leodemoura/lean,levnach/lean,sp3ctum/lean,leodemoura/lean,fpvandoorn/lean2