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-awhite575

更新仓库描述和 README，它们目前指向 GitHub School 的游戏副本。将两个 URL 都更改为 https://githubschool.github.io/github-games-awhite575，然后检查仓库页面和 README，确认两个链接都指向此副本。

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