Update note in gettingstarted example

examples_RPi/gettingstarted.cpp

@@ -47,7 +47,7 @@ RF24 radio(RPI_V2_GPIO_P1_15, RPI_V2_GPIO_P1_24, BCM2835_SPI_SPEED_8MHZ);
 //RPi Alternate, with mraa
 //RF24 radio(15,24);
 
-//RPi Alternate, with SPIDEV - Note: Edit RF24/arch/RPi/spi.cpp and  set 'this->device = "/dev/spidev0.0";;' 
+//RPi Alternate, with SPIDEV - Note: Edit RF24/arch/BBB/spi.cpp and  set 'this->device = "/dev/spidev0.0";;' 
 //RF24 radio(22,8);
 
 // Setup for ARM(Linux) devices like BBB using spidev (default is "/dev/spidev1.0" )