Add submission # 6468

#6468

Author: ArduinoBot

registry.txt

@@ -8233,3 +8233,4 @@ https://github.com/kkfranco98/QuickSerial.git|Contributed|QuickSerial
 https://github.com/elvandry13/UltrasonicA02YYUW.git|Contributed|UltrasonicA02YYUW
 https://github.com/m5stack/M5Unit-AudioPlayer.git|Contributed|M5UnitAudioPlayer
 https://github.com/Sensirion/arduino-i2c-stcc4.git|Contributed|Sensirion I2C STCC4
+https://github.com/fmeng/FastRotaryEncoder.git|Contributed|FastRotaryEncoder