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-ksmith-gss/

更新仓库描述和 README，它们目前指向 GitHub School 的副本。将两个 URL 都更改为 https://githubschool.github.io/github-games-ksmith-gss/，并验证显示的链接是否解析到此仓库的游戏副本。

由索引模型根据 Issue 内容生成。