Update Readme for Arduino Nano RP2040 Connect

Author: fabik111

README.md

@@ -33,7 +33,6 @@ The procedure:
 * `Arduino Opta`: press and hold the user button (`BTN_USER`) until the led (`LED_USER`) turns off
 * `Arduino MKR WiFi 1010`: short the pin 7 to GND until the led turns off
 * `Arduino GIGA R1 WiFi`: short the pin 7 to GND until the led turns off
-* `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