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-erwin-murillo

更新儲存庫描述和 README 中的 URL，將 githubschool 複製連結替換為 https://githubschool.github.io/github-games-erwin-murillo。完成的標準是兩個位置都指向該確切的遊戲 URL；編輯後驗證儲存庫描述和 README。

由索引模型根據 Issue 內容生成。