Updated howto related to CUDA and nvidia-driver

Hello, FYI, I've updated some nvidia howto related to CUDA: https://rpmfusion.org/Howto/CUDA https://rpmfusion.org/Howto/NVIDIA Mains additions are related to being able to install the latest driver from rpmfusion-nonfree-rawhide on stable fedora (using the copr for the nvidia FLOSS "tools"). Also a compatibility for cuda-11 and current Fedora was updated. Thanks for review and comments. -- - Nicolas (kwizart)