When a new version of Spatial is released, you'll want to update the Spatial app on your device.
Before updating the app, make sure all Spatial windows are closed or quit on your device.
HoloLens: go to the Microsoft store and locate the Spatial app. Click the menu underneath the Launch/Install button. You will see the option to update the app there.
Oculus Quest: navigate to the Library and search for the Spatial app. Click "Update".