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-Stevej-utc

更新仓库描述和 README 中的 URL，使两者都指向 https://githubschool.github.io/github-games-Stevej-utc。然后检查仓库页面和 README，以确认两个链接都显示该仓库自己的游戏副本。

由索引模型根据 Issue 内容生成。