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-sjohl/

檢查 repository 的描述設定和 README.md 中現有的遊戲 URL。將兩個參照更新為 https://githubschool.github.io/github-games-sjohl/，並確認描述和 README 現在都指向該位址。

由索引模型根據 Issue 內容生成。