Add submission # 3688

#3688

Author: ArduinoBot

registry.txt

@@ -6544,3 +6544,4 @@ https://github.com/Arduino-Library-Collection/Engine-Control.git|Contributed|Eng
 https://github.com/hoeken/PsychicHttp.git|Contributed|PsychicHttp
 https://github.com/rm5248/m95-eeprom-arduino.git|Contributed|M95_EEPROM
 https://github.com/DefHam140/IOTClient.git|Contributed|IOTClient
+https://github.com/allexoK/TinyDecisionTreeClassifier.git|Contributed|TinyDecisionTreeClassifier