Update README to reflect new rEFInd functionality
Update README to reflect new rEFInd functionality

0xbb/gpu-switch,maltebargholz/gpu-switch,pierremoreau/gpu-switch,l1k/gpu-switch,0xbb/gpu-switch,l1k/gpu-switch,maltebargholz/gpu-switch,l1k/gpu-switch,pierremoreau/gpu-switch,maltebargholz/gpu-switch,0xbb/gpu-switch,pierremoreau/gpu-switch