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-rkb965/

检查仓库描述和 README，然后将两个 URL 与仓库的当前位置进行比较。完成的标准是两个 URL 都指向 https://githubschool.github.io/github-games-rkb965/，且不再引用 githubschool 的副本。

由索引模型根据 Issue 内容生成。