Uber expands deal with Waymo to offer robotaxi rides in Austin, Texas and Atlanta.Starting early next year, Uber users in these cities will be matched with driverless Waymo vehicles for some trips.The deal allows Waymo rides to be offered through the Uber app, expanding Waymo's services to a broader user base.Waymo faces investor pressure to increase revenues, while Uber faces competition from Tesla's upcoming robotaxi launch.