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-margokpsc/

檢查 repository 描述和 README 中的遊戲 URL。將這兩處參照更新為指向 https://githubschool.github.io/github-games-margokpsc/，然後確認描述和 README 包含相同的目的地。

由索引模型根據 Issue 內容生成。