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-jatinc997/

更新仓库描述和 README，使两个 URL 都指向 https://githubschool.github.io/github-games-jatinc997/。验证描述和 README 各自都使用该 URL，然后确认旧的 githubschool 复制链接不再出现。

由索引模型根据 Issue 内容生成。