Update README.md

README.md

@@ -51,7 +51,7 @@ The NVS parameter "metadata_config" sets how metadata is displayed for AirPlay a
 The parameter "set_GPIO" is a comma-separated list of GPIO that will be configured as output with their value set to 1 (Vcc) or 0 (GND) at boot. This is convenient to power devices that consume less than 40mA from the side connector. Be careful because there is no conflict checks being made wrt which GPIO you're changing, so you might damage your board or create a conflict here. Syntax is:
 
 ```
-<gpio_1>=Vcc|GND[,gpio_n=Vcc|GND]
+<gpio_1>=Vcc|GND[,<gpio_n>=Vcc|GND]
 ```
 
 ### Buttons