HybridAuth’s config params correction

[juliangorge]

I would like to suggest a modification in documentation, hope can be helpful!

### Id and secret of social provider must be in keys array:

From:

'hybridauth' => [
            'providers' => [
                'google' => [
                    'enabled' => true,
                    'id' => 'YOUR GOOGLE CLIENT ID',
                    'secret' => 'YOUR GOOGLE CLIENT SECRET'
                ],
               // ......

To:

    'hybridauth' => [
            'providers' => [
                'google' => [
                    'enabled' => true,
                    'keys' => [ 
                        'id' => 'YOUR GOOGLE CLIENT ID',
                        'secret' => 'YOUR GOOGLE CLIENT SECRET'
                    ],
                ],