Bump tol for autocasted `fasterrcnn_resnet50_fpn` (#6601)
Bump tol for autocasted `fasterrcnn_resnet50_fpn` (#6601)

Not sure what have changed between CUDA-11.3 and CUDA-11.6, but bumping tolerance keeps tests green
pytorch/vision,pytorch/vision,pytorch/vision,pytorch/vision,pytorch/vision,pytorch/vision