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-MattRenda

更新仓库描述和 README，将 githubschool 游戏 URL 替换为 https://githubschool.github.io/github-games-MattRenda。确认这两个位置都指向仓库所有者的副本，并确认 README 链接可以正确解析。

由索引模型根据 Issue 内容生成。