Fix pin configuration error

Seeed-Studio/ArduinoCore-samd@b7a8798
Seeed-Studio/ArduinoCore-samd@6d8c226

Author: sago35

src/machine/board_wioterminal.go

@@ -102,8 +102,8 @@ const (
 	BCM17 = PA02 // DAC0
 	BCM18 = PB28 // FPC Digital & AD pins
 	BCM19 = PA20 // WIO_IR
-	BCM20 = PA22 // I2S SDI
-	BCM21 = PA21 // I2S SDO
+	BCM20 = PA21 // I2S SDO
+	BCM21 = PA22 // I2S SDI
 	BCM22 = PB09
 	BCM23 = PA07
 	BCM24 = PB04
@@ -171,7 +171,7 @@ const (
 	WIO_5S_UP    = PD20
 	WIO_5S_LEFT  = PD12
 	WIO_5S_RIGHT = PD09
-	WIO_5S_DOWM  = PD08
+	WIO_5S_DOWN  = PD08
 	WIO_5S_PRESS = PD10
 
 	// IRQ0