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-binitan/

Update the URL in the repository description and README to point to https://githubschool.github.io/github-games-binitan/. Check both locations for the old githubschool copy URL, then verify the README link and repository description resolve to the requested game copy.

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