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-rjwink

打开 README 和仓库描述设置，然后找到两个游戏 URL。将它们分别更新为 https://githubschool.github.io/github-games-rjwink，并验证两个链接都指向仓库的副本。

由索引模型根据 Issue 内容生成。