Update ur3_controllers.yaml
Update ur3_controllers.yaml

corrected controller names to match original ur10 and ur5 usage
UniversalRobots/Universal_Robots_Client_Library,Zagitta/ur_modern_driver,smart-robotics/ur_modern_driver,Zagitta/ur_modern_driver,smart-robotics/ur_modern_driver,UniversalRobots/Universal_Robots_Client_Library,Zagitta/ur_modern_driver,ThomasTimm/ur_modern_driver,ThomasTimm/ur_modern_driver