Fix pinout image.
Fix pinout image.

* Swap TXD/RXD

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