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-yzheng4/

打开 README 和包含描述的仓库设置。将两个错误的游戏 URL 替换为 https://githubschool.github.io/github-games-yzheng4/，然后检查渲染后的 README 和仓库页面，确认两个链接都指向此副本。

由索引模型根据 Issue 内容生成。