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-pauljong

更新 README 中的仓库描述和 URL。确认两者都指向 https://githubschool.github.io/github-games-pauljong，并确认 README 链接和仓库描述解析到该游戏副本。

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