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-frkfxn01/

更新 README 中的 URL 和仓库描述，使两者都指向 https://githubschool.github.io/github-games-frkfxn01/。检查渲染后的 README 和仓库页面，确认链接现在引用的是这个游戏的副本。

由索引模型根据 Issue 内容生成。