Returnal has been updated to version 2.003 today by Housemarque. You can find out the complete details for this update including patch notes here.
Considering the small increment in the patch number, it is very likely that this is another update with minor fixes. They might now be significant enough for Housemarque to release any patch notes for them as this was the case last time as well when a new update was released.
Returnal Update 2.003 Patch Notes
Pending
We will update the patch notes if they are released by Housemarque, but in the meanwhile, you can let us know if you have find anything new or interesting in this new patch in the comments below.