URL in description and README broken

The URL in the repository description and the one in the README are pointing to githubschool's copy of the game instead of yours.

Please fix both so they point to your copy of the game at https://githubschool.github.io/github-games-ol-Manish

Update the repository description and the URL in README. Verify both links point to https://githubschool.github.io/github-games-ol-Manish, then check the repository page and README to confirm the old githubschool copy URL is gone.

索引モデルが issue の本文から書いたものです。