stm32/boards/ARDUINO_NICLA_VISION: Fix CAN pin assignment.

The only STM32H747 pins with CAN function that are also broken out on the
board are PB8 and PB9.

Signed-off-by: Angus Gratton <angus@redyak.com.au>

Author: projectgus

ports/stm32/boards/ARDUINO_NICLA_VISION/mpconfigboard.h

@@ -186,8 +186,8 @@ extern struct _spi_bdev_t spi_bdev;
 
 // FDCAN bus
 #define MICROPY_HW_CAN1_NAME        "FDCAN1"
-#define MICROPY_HW_CAN1_TX          (pin_A10)
-#define MICROPY_HW_CAN1_RX          (pin_A9)
+#define MICROPY_HW_CAN1_TX          (pin_B9)
+#define MICROPY_HW_CAN1_RX          (pin_B8)
 #define MICROPY_HW_CAN_IS_RESERVED(id) (id != PYB_CAN_1)
 
 // LEDs