Add call to `txStandBy()` in `write_to_pipe` #107

Job	Run time
build (adafruit_feather_rp2040) / build	1m 3s
build (adafruit_qtpy_rp2040) / build	1m 53s
build (adafruit_itsybitsy_rp2040) / build	1m 15s
build (arduino_nano_rp2040_connect) / build	1m 1s
build (pico) / build	1m 39s
build (pimoroni_pga2040) / build	1m 17s
build (pimoroni_picolipo_16mb) / build	1m 44s
build (pimoroni_picolipo_4mb) / build	58s
build (pimoroni_tiny2040) / build	1m 0s
build (sparkfun_micromod) / build	1m 15s
build (sparkfun_promicro) / build	1m 25s
build (sparkfun_thingplus) / build	1m 10s
	15m 40s

Provide feedback