Sony has updated the PS5 system software to version 22.01-05.02. What does the new firmware do? Not much more than the old one, actually. The official release note speaks of a simple improvement in performance, which we can translate into the classic increase in overall stability.
After all, the latest substantial update of the PS5 firmware is quite recent, since it dates back to March 23, 2022, so it was natural not to expect much else, also given the progressive number used.
The PS5 system software will be updated automatically. In case the operation is not successful or you have some problem, you can download the file and upload it to a USB drive to install it manually. This is the download link.