Add submission # 4507

#4507

Author: ArduinoBot

registry.txt

@@ -7028,3 +7028,4 @@ https://github.com/dndg/OptaUSBUpdate.git|Contributed|OptaUSBUpdate
 https://github.com/adafruit/Adafruit_S-35710.git|Recommended|Adafruit S-35710 Library
 https://github.com/RobTillaart/LTR390_DFR.git|Contributed|LTR390_DFR
 https://github.com/RobTillaart/LTR390_RT.git|Contributed|LTR390_RT
+https://github.com/mlesniew/PicoWebsocket.git|Contributed|PicoWebsocket