Add submission # 7406

#7406

Author: ArduinoBot

registry.txt

@@ -8722,3 +8722,4 @@ https://github.com/nbulatovi/Quecduino.git|Contributed|Quecduino
 https://github.com/adafruit/Adafruit_SGP41.git|Recommended|Adafruit SGP41
 https://github.com/Alby312/AdvancedPID.git|Contributed|AdvancedPID
 https://github.com/raiotech-iot/RAIOT_MQTT.git|Contributed|RAIOT_MQTT
+https://github.com/BojanJurca/Lightweight-Fully-Connected-Neural-Network.git|Contributed|LightweightNeuralNetwork