No. On Raspberry Pi it's not possible to update from Volumio 3 to Volumio 4 over the air: you need to write a new Volumio 4 image to your SD card.
Volumio 4 is a fundamental change from Volumio 3, and a fresh installation is the only way to make sure everything works correctly.
A fresh installation resets all settings, so you'll need to configure your device again afterwards.