NN: fix mean values for GS images.
NN: fix mean values for GS images.

kwagyeman/openmv,iabdalkader/openmv,iabdalkader/openmv,openmv/openmv,openmv/openmv,openmv/openmv,openmv/openmv,iabdalkader/openmv,iabdalkader/openmv,kwagyeman/openmv,kwagyeman/openmv,kwagyeman/openmv