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-krisdehe

打开仓库的 README，并检查 GitHub 上显示的仓库描述。更新两个 URL，使其指向 https://githubschool.github.io/github-games-krisdehe，然后验证 README 链接和描述都解析到该地址。

由索引模型根据 Issue 内容生成。