URL in description and README broken

The URL in the repository description and 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-dashram/

Check the repository description and README, where the broken URLs are identified. Update both links to point to https://githubschool.github.io/github-games-dashram/ and verify that each now opens the repository's copy of the game.

索引モデルが issue の本文から書いたものです。