Apple has released the second beta of watchOS 2.2.1 for the Apple Watch to developers. The configuration profile needed for the update can be found at the watchOS Developer Resource Center.

Apple seeds watchOS 2.2.1 beta 2 to developers

This release is strictly for developers, so you'll have to be registered in Apple's developer program and running the latest iOS 9.3 beta release on your iPhone to grab this update. Otherwise, you can head to the Apple Watch app on your phone, then tap "General" and "Software Update" to start downloading the latest beta release.