[RTduino][stm32f469-disco][readme] fix typo

bsp/stm32/stm32f469-st-disco/applications/arduino_pinout/README.md

@@ -23,7 +23,7 @@ Hardware Drivers Config --->
 This board complies with Arduino UNO pins layout. For more details, please take a look at: [pins_arduino.c](pins_arduino.c) and [pins_arduino.h](pins_arduino.h).
 
 | Arduino Pin           | STM32 Pin | 5V Tolerate | Note                                                                                          |
-| ----------- | --------- | ----------- | --------------------------------------------------------------------------------------------- |
+| --------------------- | --------- | ----------- | --------------------------------------------------------------------------------------------- |
 | 0 (D0)                | PG9       | Yes         | Serial-Rx. Token over by RT-Thread UART device by default                                     |
 | 1 (D1)                | PG14      | Yes         | Serial-Tx. Token over by RT-Thread UART device by default                                     |
 | 2 (D2)                | PG13      | Yes         |                                                                                               |
@@ -37,7 +37,7 @@ This board complies with Arduino UNO pins layout. For more details, please take
 | 10 (D10)              | PH6       | Yes         | PWM12-CH1. Token over by RT-Thread PWM device by default                                      |
 | 11 (D11)              | PB15      | Yes         | PWM12-CH2. Token over by RT-Thread PWM device by default                                      |
 | 12 (D12)              | PB14      | Yes         |                                                                                               |
-| 13 (D13, )  | PD3       | Yes         | USER LED1                                                                                     |
+| 13 (D13, LED_BUILTIN) | PD3       | Yes         | USER LED1                                                                                     |
 | 14 (D14)              | PB9       | Yes         | I2C-SDA. Token over by RT-Thread I2C device by default                                        |
 | 15 (D15)              | PB8       | Yes         | I2C-SCL. Token over by RT-Thread I2C device by default                                        |
 | 16 (D16)              | PA0       | Yes         | USER Button                                                                                   |

bsp/stm32/stm32f469-st-disco/applications/arduino_pinout/README_zh.md

@@ -23,7 +23,7 @@ Hardware Drivers Config --->
 该BSP遵照Arduino UNO板的引脚排列方式，详见 [pins_arduino.c](pins_arduino.c) 和 [pins_arduino.h](pins_arduino.h)。
 
 | Arduino引脚编号           | STM32引脚编号 | 5V容忍 | 备注                                            |
-| ----------- | --------- | ---- | --------------------------------------------- |
+| --------------------- | --------- | ---- | --------------------------------------------- |
 | 0 (D0)                | PG9       | 是    | Serial-Rx，默认被RT-Thread的UART设备框架uart3接管        |
 | 1 (D1)                | PG14      | 是    | Serial-Tx，默认被RT-Thread的UART设备框架uart3接管        |
 | 2 (D2)                | PG13      | 是    |                                               |
@@ -37,7 +37,7 @@ Hardware Drivers Config --->
 | 10 (D10)              | PH6       | 是    | PWM12-CH1，默认被RT-Thread的PWM设备框架pwm12接管         |
 | 11 (D11)              | PB15      | 是    | PWM12-CH2，默认被RT-Thread的PWM设备框架pwm12接管         |
 | 12 (D12)              | PB14      | 是    |                                               |
-| 13 (D13, )  | PD3       | 是    | 板载用户LED1                                      |
+| 13 (D13, LED_BUILTIN) | PD3       | 是    | 板载用户LED1                                      |
 | 14 (D14)              | PB9       | 是    | I2C-SDA，被RT-Thread的I2C设备框架i2c1总线接管            |
 | 15 (D15)              | PB8       | 是    | I2C-SCL，被RT-Thread的I2C设备框架i2c1总线接管            |
 | 16 (D16)              | PA0       | 是    | 板载用户按键                                        |