Update SSH Key for CodeShip in Settings

[justinsa]

@revolunet as the repository owner you are the only one who can update the SSH Keys used for deployment to CodeShip. The CodeShip build is failing because it cannot reach the repository.

The SSH public key from CodeShip can be found here: https://app.codeship.com/projects/100418/configure. Once you have the SSH public key, go to "Settings > Deploy Keys" in this repository and add the CodeShip key. That's it!