Exactly, it’s called false advertising.
Definition of milk 1 a : a fluid secreted by the mammary glands of females for the nourishment of their young; especially : cow's milk used as a food by humans b : lactation 2 : a liquid resembling milk in appearance: as a : the latex of a plant b : the juice of a coconut composed of liquid endosperm c : the contents of an unripe kernel of grainPay attention to definition 2.