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-deremer-coder

更新 README 和 repository 描述中的 URL，將 githubschool 副本替換為 https://githubschool.github.io/github-games-deremer-coder。確認這兩個位置都指向 repository 自己的遊戲頁面。

由索引模型根據 Issue 內容生成。