restore colours back to originals to minimise changes.
of course, now there have been changes, a full audit and review is
required, where one was not needed before
restore ECP5_FPGA.mdwn, ft232r_jtag_wires.jpg, ulx3s_fpga_jtag_wires.jpg
to commit
9c9a0a0d42cb752c94fa4e0a8b34ff21c017cf19 to correct erroneous
removal of the red VCC wire in images and the reference material on the
wiki markdown