Add submission # 6233

#6233

Author: ArduinoBot

registry.txt

@@ -8082,3 +8082,4 @@ https://github.com/fanfanlatulipe26/ESP32_ppm.git|Contributed|ESP32_ppm
 https://github.com/DFRobot/DFRobot_C4001.git|Contributed|DFRobot_C4001
 https://github.com/drmpf/RTC_NTP_replacement.git|Contributed|RTC_NTP_replacement
 https://github.com/jmksn/ArduEasy.git|Contributed|ArduEasy
+https://github.com/eyr1n/RP2040PIO_CAN.git|Contributed|RP2040PIO_CAN