Add submission # 4996

#4996

Author: ArduinoBot

registry.txt

@@ -7375,3 +7375,4 @@ https://github.com/zwieblum/ch32_deep_sleep.git|Contributed|CH32_Deep_Sleep
 https://github.com/semilimes/semilimes_mcu_sdk.git|Contributed|semilimes
 https://github.com/loginov-rocks/BluetoothTerminal.git|Contributed|BluetoothTerminal
 https://github.com/yuri-rage/arduino-i2c-slave.git|Contributed|I2C_Slave
+https://github.com/arduino-libraries/Arduino_LowPowerPortentaC33.git|Arduino|Arduino_LowPowerPortentaC33