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-Johnson2003/

更新 repository 描述和 README 中的 URL。首先将当前的两个链接与 issue 中的目标 URL 进行比较，然后验证两者都指向 https://githubschool.github.io/github-games-Johnson2003/。

由索引模型根据 Issue 内容生成。