[MKC-776] Add boards to OTA docs

- Added Portenta MC + Nicla Vision to OTA guide
- Added Portenta MC to getting started guide

Author: karlsoderby

content/arduino-cloud/01.getting-started/01.iot-cloud-getting-started/iot-cloud-getting-started.md

@@ -59,6 +59,7 @@ The following boards connect to the Arduino IoT Cloud via Wi-Fi.
 - [Nano 33 IoT](https://store.arduino.cc/arduino-nano-33-iot)
 - [Portenta H7](https://store.arduino.cc/portenta-h7)
 - [Portenta H7 Lite Connected](https://store.arduino.cc/products/portenta-h7-lite-connected)
+- [Portenta Machine Control](https://store.arduino.cc/products/arduino-portenta-machine-control)
 - [Nicla Vision](https://store.arduino.cc/products/nicla-vision)
 - [Opta](https://docs.arduino.cc/hardware/opta).\* 
 

content/arduino-cloud/02.features/04.ota-getting-started/ota-getting-started.md

@@ -28,6 +28,8 @@ Below is a list of all boards that supports OTA through the Arduino Cloud.
 - [Arduino Nano 33 IoT](https://store.arduino.cc/arduino-nano-33-iot)
 - [Arduino Nano RP2040 Connect](https://store.arduino.cc/nano-rp2040-connect-with-headers)
 - [Portenta H7](https://store.arduino.cc/portenta-h7)
+- [Portenta Machine Control](https://store.arduino.cc/products/arduino-portenta-machine-control)
+- [Nicla Vision](https://store.arduino.cc/products/nicla-vision)
 
 
 ## How does it work