[Docs] Fix Header formatting in compatible mcu doc (#15438)

docs/compatible_microcontrollers.md

@@ -37,8 +37,8 @@ You can also use any ARM chip with USB that [ChibiOS](https://www.chibios.org) s
  * [STM32L422](https://www.st.com/en/microcontrollers-microprocessors/stm32l4x2.html)
  * [STM32L433](https://www.st.com/en/microcontrollers-microprocessors/stm32l4x3.html)
  * [STM32L443](https://www.st.com/en/microcontrollers-microprocessors/stm32l4x3.html)
- 
- ### WestBerryTech (WB32)
+
+### WestBerryTech (WB32)
 
  * [WB32F3G71xx](http://www.westberrytech.com)
 
@@ -57,4 +57,4 @@ There is limited support for one of Atmel's ATSAM microcontrollers, that being t
 
 ### GigaDevice
 
-[ChibiOS-Contrib](https://github.com/ChibiOS/ChibiOS-Contrib) has support for the GigaDevice [GD32VF103 series](https://www.gigadevice.com/products/microcontrollers/gd32/risc-v/mainstream-line/gd32vf103-series/) microcontrollers and provides configurations for the [SiPeed Longan Nano](https://longan.sipeed.com/en/) development board that uses this microcontroller. It is largely pin and feature compatible with STM32F103 and STM32F303 microcontrollers.
+[ChibiOS-Contrib](https://github.com/ChibiOS/ChibiOS-Contrib) has support for the GigaDevice [GD32VF103 series](https://www.gigadevice.com/products/microcontrollers/gd32/risc-v/mainstream-line/gd32vf103-series/) microcontrollers and provides configurations for the [SiPeed Longan Nano](https://longan.sipeed.com/en/) development board that uses this microcontroller. It is largely pin and feature compatible with STM32F103 and STM32F303 microcontrollers.