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-jlamons/

更新仓库描述和 README，将 githubschool 游戏 URL 替换为 https://githubschool.github.io/github-games-jlamons/。验证这两个位置都指向完全相同的 URL，并确认 README 链接有效。

由索引模型根据 Issue 内容生成。