Update README.md

Fix typo

README.md

@@ -112,7 +112,7 @@ class ModelName extends Model implements InteractWithRecommendation
                 'recommendation_data_field'        => 'recommendation_data_field',
                 'recommendation_data_field_type'   => 'recommendation_data_field_type',
                 'recommendation_group_field'       => 'recommendation_group_field',
-                'recommendation_count'             => 5
+                'recommendation_count'             => 5,
                 'recommendation_order'             => 'desc'
             ]
         ];