Eight tidbits for service academy football fans after a busy weekend. 1. Cowboy coach: I’m sorry. Wyoming head coach Dave Christensen apologized Sunday, via a school news release, for his heated postgame exchange with Air Force head coach Troy Calhoun on Saturday — and his postgame interview that all but accused Calhoun of cheating. At issue: When Air Force quarterback Connor Dietz lost his helmet on a fourth-quarter drive and had to miss a play, Christensen said he thought the QB and Air Force coaches may have exaggerated their concern over a possible head injury, giving the Falcons enough time…