chore(README): update appveyor link [skip ci]
chore(README): update appveyor link [skip ci]
leanprover-community/lean,dselsam/lean,leanprover-community/lean,fpvandoorn/lean,leanprover-community/lean,digama0/lean,digama0/lean,digama0/lean,fpvandoorn/lean,leanprover-community/lean,dselsam/lean,fpvandoorn/lean,leanprover-community/lean,fpvandoorn/lean,dselsam/lean,dselsam/lean,digama0/lean,leanprover-community/lean,digama0/lean,digama0/lean,fpvandoorn/lean,fpvandoorn/lean,dselsam/lean,dselsam/lean