Updated the documentation to reflect the semantic change
Updated the documentation to reflect the semantic change

crowdint/acts_as_shopping_cart,kulte/acts_as_shopping_cart,dabit/acts_as_shopping_cart,dabit/acts_as_shopping_cart,roberttaraya/acts_as_shopping_cart,eubanksanator/acts_as_shopping_cart,roberttaraya/acts_as_shopping_cart,crowdint/acts_as_shopping_cart,kulte/acts_as_shopping_cart,eubanksanator/acts_as_shopping_cart