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-errahulsharma1/

更新儲存庫描述和 README，目前它們指向 githubschool 的副本。將兩個 URL 替換為 https://githubschool.github.io/github-games-errahulsharma1/，並確認描述和 README 是否連結到此儲存庫的遊戲頁面。

由索引模型根據 Issue 內容生成。