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-ronanmcallister

更新仓库描述和 README，它们当前指向 GitHub School 的副本。将两个 URL 更改为 https://githubschool.github.io/github-games-ronanmcallister，然后检查渲染后的 README 和仓库页面，以确认链接指向此副本。

由索引模型根据 Issue 内容生成。