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-lpofxenon

打开仓库的 README 并检查仓库描述，然后将每个 URL 与 issue 中给出的目标 URL 进行比较。当两个位置都指向 https://githubschool.github.io/github-games-lpofxenon 时即表示完成。

由索引模型根据 Issue 内容生成。