Apple Inc. is planning to introduce its first upgrade to the $3,499 Vision Pro headset as early as this year, aiming to improve the performance and comfort of a device that has been slow to catch on with consumers.The updated Vision Pro will include a faster processor and components that can better run artificial intelligence, according to people with knowledge of the matter. There also will be a new strap to make it easier to wear the headset for long periods of time, said the people, who asked...