Update README.md
Added SWO checkmark for the board having this feature.
@@ -61,12 +61,12 @@ The above firmware builds include support for the class libraries and features m
| Target | Gpio | Spi | I2c | Pwm | Adc | Serial | Events | SWO |
-|:-|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|
-| ST_STM32F4_DISCOVERY | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | | | :heavy_check_mark: | | :heavy_check_mark: |
-| ST_STM32F429I_DISCOVERY | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | | :heavy_check_mark: | :heavy_check_mark: | | :heavy_check_mark: |
+|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|:-:|
+| ST_STM32F4_DISCOVERY | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | | | :heavy_check_mark: | :heavy_check_mark: |
+| ST_STM32F429I_DISCOVERY | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
| ST_NUCLEO64_F091RC | | | | :heavy_check_mark: | | | | | :heavy_check_mark: |
-| ST_NUCLEO144_F746ZG | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | | :heavy_check_mark: | :heavy_check_mark: | | |
-| ST_STM32F769I_DISCOVERY | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | | :heavy_check_mark: | :heavy_check_mark: | | :heavy_check_mark: |
+| ST_NUCLEO144_F746ZG | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
+| ST_STM32F769I_DISCOVERY | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
| MBN_QUAIL | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | | :heavy_check_mark: | :heavy_check_mark: | | |
| NETDUINO3_WIFI | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | | :heavy_check_mark: | :heavy_check_mark: | | |
| ESP32_DEVKITC | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | | | | :heavy_check_mark: | | |
