Bug#1123801: Please package a driver supporting Blackwell GPUs

[protondebian]

Hopefully I am doing this correctly; I don't quite understand Debian's bug 
tracker system.
Yes, we could do with a newer NVIDIA driver, at least in the backports repo! 
The 580 driver is an objective improvement over 550 in every way, from 
stability, to Wayland support, to sleep behaviour, and of course performance. 
580 as I understand is an LTS driver too, so it should fit fine with the 
backports (if not the main Trixie branch).