Add submission # 6520

#6520

Author: ArduinoBot

registry.txt

@@ -8265,3 +8265,4 @@ https://github.com/mikeedudee/MS5611-Mike-Refactored.git|Contributed|MS5611 Libr
 https://github.com/TheBlackSwitch/PS2Keyboard.git|Contributed|PS2KEyboard
 https://github.com/SNP-FIT/ampify-soil-moisture-sensor.git|Contributed|AmpifySoilMoisture
 https://github.com/GalaidaMaxim/Delayer.git|Contributed|Delayer
+https://github.com/msnicklous/BufferedTrace.git|Contributed|BufferedTrace