add https://github.com/bdlow/IO22_IO_Board (#5318)

Author: af3556

repositories.txt

@@ -1151,6 +1151,7 @@ https://github.com/bblanchon/ArduinoJson
 https://github.com/bblanchon/ArduinoStreamUtils
 https://github.com/bblanchon/ArduinoTrace
 https://github.com/BCISOFT/OvhAPI
+https://github.com/bdlow/IO22_IO_Board
 https://github.com/BeanieBob/GY26Compass
 https://github.com/BEAT-System/SerialCom
 https://github.com/beegee-tokyo/Blues-Minimal-I2C