fix(02): link
fix(02): link

avigad/tutorial,leanprover/tutorial,fpvandoorn/tutorial,avigad/tutorial,soonhokong/lean-tutorial,Hodapp87/cs6460_project,leanprover/tutorial,Hodapp87/cs6460_project,avigad/tutorial,fpvandoorn/tutorial,leanprover/tutorial,fpvandoorn/tutorial,Hodapp87/cs6460_project,soonhokong/lean-tutorial,soonhokong/lean-tutorial