(Reuters) -Gains in French IT consultancy Capgemini’s operating margin this year will likely be held back by inflationary pressures on salary and the cost of returning to offices, the company said after reporting robust results on Monday. The firm, which offers its services to industries ranging from telecommunications to aerospace, expects a 2022 operating margin of 12.9% to 13.1% and revenue growth of 8%-10% at constant currency. For 2021, it posted an operating margin of 12.9%, back at pre-pandemic levels, on revenue of 18.16 billion euros ($20.52 billion), up 15.1% at constant currency. Ca…