Update api_gpio.js

Author: amizer12

fs/api_gpio.js

@@ -37,8 +37,9 @@ let GPIO = {
   // Read GPIO pin level. Return value: 0 or 1.
   read: ffi('int mgos_gpio_read(int)'),
 
-  //read GPIO level for OUTPUT GPIO mode. Return value: 0 or 1.
-  readout: ffi ('int mgos_gpio_read_out(int)'),
+  // ## **`GPIO.read(pin)`**
+  // Read GPIO pin level for GPIO in OUTPUT state. Return value: 0 or 1.
+  read_out: ffi ('int mgos_gpio_read_out(int)'),
 
   // ## **`GPIO.enable_int(pin)`**
   // Enable interrupts on GPIO pin.