Kylie Jenner and Timothée Chalamet kept it low-key at Coachella. Jenner, 27, and Chalamet, 29, were spotted walking around the Coachella Valley Music and Arts Festival grounds in Indio, California, on Saturday, April 12. Jenner rocked a white crop top with coordinating joggers, covering her long tresses with a camo-print baseball cap in photos obtained…