A retailer can launch a promotion across hundreds of stores in a morning. Making sure every employee knows how to sell it is a different challenge. Bites is building its AI training platform around that gap, raising a $40 million Series A to connect short, mobile-delivered lessons with the sales, service and operational results those lessons are meant to improve. The financing, announced October 29, brings Bites’ total funding to $55 million. PeakSpan Capital led the round, with participation…