Add submission # 6815

#6815

Author: ArduinoBot

registry.txt

@@ -8302,3 +8302,4 @@ https://github.com/kenchow96/faster-trig-2040.git|Contributed|faster-trig-2040
 https://github.com/nexbyteio/ZenRTC.git|Contributed|ZenRTC
 https://github.com/italo-coelho/Dimmer_ITC.git|Contributed|Dimmer_ITC
 https://github.com/DFRobot/DFRobot_MHZ9041A.git|Contributed|DFRobot_MHZ9041A
+https://github.com/m5stack/M5Unit-Miniscale.git|Contributed|UNIT_MINISCALE