A PS5 update has now been released including 4K (temporal) resolution, 60 FPS and DualSense support.
The update is free for all owners of the PS4 disc or digital edition, however the save games do not currently transfer.
Free PS5 Version Upgrade
This game comes with a free update to the PlayStation 5 native version.
If you own the digital version, you can download the PS5 edition from the PlayStation Store. If you own the disc version, you can download the PS5 edition but will need to insert the disc each time you play.