Update Nicla Vision reset procedure to README

Author: fabik111

README.md

@@ -36,6 +36,7 @@ The procedure:
 * `Arduino Nano RP2040 Connect`: short the pin 2 to 3.3V until the led turns off
 * `Arduino Portenta H7`: short the pin 0 to GND until the led turns off
 * `Arduino Portenta C33`: short the pin 0 to GND until the led turns off
+* `Nicla Vision`: short the pin PA_13 to GND until the led turns off
 * Other boards: short the pin 2 to GND until the led turns off
 * `Portenta Machine Control`: currently the reset procedure is not available