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-khanhbtran/

Open the README and inspect the repository description settings. Confirm both existing links currently target githubschool's copy, then update them to https://githubschool.github.io/github-games-khanhbtran/. Done means the README URL and repository description URL both point to the project's own copy.

Written by the indexing model from the issue text.