LOS ANGELES — If you work in an office, what did you wear today?Chances are your outfit was considerably more casual than it was a few years ago. Office dress codes continue to become more relaxed, spurred in part by the influx of millennials in the workforce.“Dressing up for work continues to go out of style,” according to a survey released earlier this month by OfficeTeam, an arm of the office-staffing firm Robert Half International Inc.Half the senior managers interviewed in the survey said their workers wear less formal clothing than they did five years ago, and 47 percent said their employees dressed “too casually.” The survey also showed that 32 percent of managers said their workers showed “too much skin.”Another sign of the times: Banking giant J.P.