Disable blue led on esp32-dev

[DigiH]

@vasil_d

Until v0.94 the blue LED/light was off and did not bother me , but after upgrading to 0.95 the light is ON when the board is powered. Bit it is very bright.

I have changed

'-DLED_RECEIVE_ON=0'

to

'-DLED_RECEIVE_ON=1'

in the relevant environment.

Not sure if this was the correct/best way, but made it more pleasant for me than with the blue LED on constantly