Update total pins

pin 95 is onboard SD detect. Real total pins is then 96 not 95

Author: GMagician

variants/grand_central_m4/variant.h

@@ -57,7 +57,7 @@ extern "C"
  *----------------------------------------------------------------------------*/
 
 // Number of pins defined in PinDescription array
-#define PINS_COUNT           (94)
+#define PINS_COUNT           (96)
 #define NUM_DIGITAL_PINS     (53)
 #define NUM_ANALOG_INPUTS    (19)
 #define NUM_ANALOG_OUTPUTS   (2)