Update pins_arduino.h

Author: lboue

variants/m5stack_nanoc6/pins_arduino.h

@@ -20,10 +20,10 @@ static const uint8_t RX = 17;
 static const uint8_t SDA = 2;
 static const uint8_t SCL = 1;
 
-static const uint8_t SS = 21;
-static const uint8_t MOSI = 18;
-static const uint8_t MISO = 20;
-static const uint8_t SCK = 19;
+static const uint8_t SS = 4;    // Not connected
+static const uint8_t MOSI = 5;  // Not connected
+static const uint8_t MISO = 6;  // Not connected
+static const uint8_t SCK = 8;   // Not connected
 
 static const uint8_t A1 = 1;
 static const uint8_t A2 = 2;