correct some eggregious errors circa chatgpt, and start the multi-sink

2023-12_usb-real-data-rates.md

code/serial_multi_sink/cobs_usb_serial.py

code/serial_multi_sink/multi_sink.py

code/serial_multi_sink/serial_list.py

code/serial_sink/sink.py

code/serial_source/serial_source.ino

...3-12-20_ingest-histogram-single-source-pck-128-133mhz.png

images/2023-12-20_ingest-histogram-single-source-pck-128.png

images/2023-12-20_ingest-histogram-single-source-pck-250.png

images/2023-12-20_ingest-histogram-single-source-pck-32.png