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-SpaceControlSystems

Update the URL in the README and the repository description so both point to https://githubschool.github.io/github-games-SpaceControlSystems. Start by checking the current link in each location, then verify that both links resolve to the repository's copy of the game.

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