Add submission # 5654

#5654

Author: ArduinoBot

registry.txt

@@ -7735,3 +7735,4 @@ https://github.com/CIRCUITSTATE/CSE_ZH06.git|Contributed|CSE_ZH06
 https://github.com/alkonosst/MCP23017.git|Contributed|MCP23017_MR
 https://github.com/Morgritech/MT-arduino-rotary-encoder.git|Contributed|MT-arduino-rotary-encoder
 https://github.com/dndubins/tinyServo84.git|Contributed|tinyServo84
+https://github.com/Seeed-Studio/Seeed_Serial_MP3_Player.git|Contributed|Seeed Serial MP3 Player