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-kpham-isd/

更新仓库描述和 README，检查现有的两个 URL 是否都指向 issue 中的目标 URL。完成标准是两个位置都指向 https://githubschool.github.io/github-games-kpham-isd/；保存后验证 README 链接和仓库描述。

由索引模型根据 Issue 内容生成。