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-madhumb7

首先打开 README 和仓库描述设置，然后将其中当前的游戏 URL 与 issue 中给出的 URL 进行比较。当这两个位置都指向 https://githubschool.github.io/github-games-madhumb7 时，即表示完成。

由索引模型根据 Issue 内容生成。