IR learning guides have ones and zeros swapped

[bradanlane]

There are several CircuitPython learning guides related to IR. When tested them, they produced "2's compliment" results. I discovered the transmit examples had reversed the values for a "0" vs a "1".

To verify, my observation, I reviewed the sample code from the irremote CircuitPython library. The library code has the correct values for "0" and "1".

This pull request makes that corrections for the learning guides.

The learning guide changes were run on a Raspberry Pi PICO with the Adafuit IR Emitter module and the IR Receiver module