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-u8D123/

更新 repository 描述和 README 中的 URL。在這兩個位置都使用 https://githubschool.github.io/github-games-u8D123/，並確認兩個連結都沒有指向 githubschool 的遊戲副本。

由索引模型根據 Issue 內容生成。