Bud Light sales plunged in May, toppling the beer brand from its longtime perch as the nation’s best-selling brew.Parent company Anheuser-Busch InBev (ABI) sold $297 million worth of Bud Light for the four weeks ending May 28 — a 23% drop from the same time period the year before, according to consumer behavior data analytics firm Circana. Modelo Especial ranked No.1 in May, with $333 million in sales — a 1 …