Add submission # 7226

#7226

Author: ArduinoBot

registry.txt

@@ -8568,3 +8568,4 @@ https://github.com/Bridgetek/EVE2-2-Arduino-Dev.git|Contributed|Bridgetek_EVE2_2
 https://github.com/steinundfloete/MIDI-NRPN.git|Contributed|MIDI-NRPN
 https://github.com/arduino-libraries/Arduino_USBHIDHost.git|Arduino|Arduino_USBHIDHost
 https://github.com/VLPLAY-Games/Xeno-Language.git|Contributed|Xeno Language
+https://github.com/chipnorm/LED_Matrix.git|Contributed|ChipNorm_LED_Matrix