Apple has released watchOS 9.5.1 for the Apple Watch. According to Apple’s release notes for the update, it includes “improvements and bug fixes.”
Apple Watch owners can download watchOS 9.5 by opening up the Apple Watch app on their iPhone and going to General > Software Update. To install the new software, the Apple Watch needs to have at least 50% battery, it needs to be placed on a charger, and it needs to be in range of the iPhone.