feat(index.html): update authors, title, and description
feat(index.html): update authors, title, and description

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