Along with the new version 13.0.0 firmware for Switch that was released last night, Nintendo is offering a new controller update. To update the controllers, accessing the system settings, then go to the “Controllers and Sensors” tab and select the “Update Controllers” option. The controllers will update one at a time after that.
Switch update version 13.0.0 added Bluetooth audio support, along with an “Update Dock” setting for docks with a LAN port to obtain software updates. In addition, there is now an option for “Maintain Internet Connection in Sleep Mode” under Sleep Mode in the settings and a change to how “Calibrate Control Sticks” is initiated.