Game broken

When attempting to access this at https://githubschool.github.io/github-games-umagitac, I am getting a 404. This could be caused by a couple things:

- GitHub pages needs to be enabled on master. You can fix this in the repository settings.
- the index.html file is incorrectly named inde.html. We will fix this together in class.

Can you please fix the first bullet @umagitac?

Start in the repository settings and check whether GitHub Pages is enabled with master as the publishing branch. Then revisit the reported GitHub Pages URL and confirm it no longer returns a 404. The requested work is complete when the site loads successfully.

索引モデルが issue の本文から書いたものです。