Game broken

When attempting to access this at https://githubschool.github.io/github-games-2031077/, 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 @2031077?

Start by checking the repository settings for GitHub Pages and whether it is enabled on master, as requested in the first bullet. Verify the deployed URL no longer returns a 404; the issue also mentions index.html being incorrectly named inde.html, but that is outside the requested fix.

索引モデルが issue の本文から書いたものです。