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-nikkoboy09

更新仓库描述和 README，使两个 URL 都指向 https://githubschool.github.io/github-games-nikkoboy09。首先打开 README 并检查仓库描述设置，然后确认两处引用都使用所要求的 URL。

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