Sony has released a new firmware update for the PS5. It is available to download now. This appears to deal with minor stability improvements.
The latest update version for PS5 is 21.01-03.21.00.00. You should be able to download it from PS5 or you can grab the update file from here.
PS5 users can also participate in a beta test program that allows them to install the latest firmware updates before they are available for the general public. There doesn’t appear to be a major beta firmware update available for now so this new software update could be a minor stability improvement patch.