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-ychen157

检查 README 和仓库描述，这两个位置在 issue 中有所指定。将两个 URL 都更新为 https://githubschool.github.io/github-games-ychen157，然后确认每个位置都指向该游戏的准确副本。

由索引模型根据 Issue 内容生成。