HOUSTON — Nolan Arenado homered, Alec Burleson added an RBI double to back up a solid start by Miles Mikolas and the St. Louis Cardinals beat the Houston Astros 4-2 on Wednesday. Burleson’s hit made it 3-0 in the fifth inning and Arenado added an insurance run in the sixth after the Astros got within 1 in the bottom of …