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-a00125970

更新仓库描述中的 URL 和 README 中的 URL，使两者都指向 https://githubschool.github.io/github-games-a00125970。随后检查渲染后的 README 和仓库页面，确认两者都不再指向 githubschool 的副本。

由索引模型根据 Issue 内容生成。