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-MichaelHeynAmway

更新 issue 中提到的两个位置：repository 描述和 README。将现有的游戏 URL 替换为 https://githubschool.github.io/github-games-MichaelHeynAmway，然后验证这两个位置都指向该 URL。

由索引模型根据 Issue 内容生成。