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-prashanthtg/

更新 issue 中指出的儲存庫描述和 README。檢查每個目前的遊戲 URL，並將其替換為 https://githubschool.github.io/github-games-prashanthtg/。當兩個位置都指向此儲存庫的副本時，即表示完成。

由索引模型根據 Issue 內容生成。