A St. Louis federal judge approved an $11.2 million settlement between the online-dating service Ashley Madison and users who sued after hackers released the users’ personal information.The service is marketed to married people interested in having affairs.U.S. District Judge John A. Ross gave the green light to a class-action settlement Nov. 20 that was preliminarily approved in July.Lawsuits against Ruby Corp. — the parent company previously known as Avid Life Media Inc. — from around the country were …