I can confirm that I successfully updated. My PSVR was below version 3.1, and my console is not connected to the internet. Since version 3.1 for PSVR is included in PS4 firmware version 5.05, I could update my PSVR offline by going to: debug settings ----->psvr----> update firmware. Updated PSVR and works fine.
If you have PSVR firmware above version 3.1, then you would need to use a payload, which I do not have expereince with, and therefore cannot give advice.