readme typo

Author: askuric

Diff for: README.md

@@ -706,6 +706,7 @@ User can add a STM32 based board following this [wiki](https://github.com/stm32d
 | :----: | :-------: | ---- | :-----: | :---- |
 | :green_heart:  | STM32L412K8<br>STM32L412KB<br>STM32L422KB | Generic Board | *2.0.0* |  |
 | :yellow_heart:  | STM32L412RBIxP<br>STM32L412RBTxP | Generic Board | **2.11.0** |  |
+| :green_heart: | STM32L431CB<br>STM32L431CC | Generic Board | *2.8.1* | |
 | :green_heart:  | STM32L431RB<br>STM32L431RC | Generic Board | *2.3.0* |  |
 | :green_heart:  | STM32L432KB<br>STM32L432KC<br>STM32L442KC | Generic Board | *2.0.0* |  |
 | :green_heart:  | STM32L433CBT<br>STM32L433CCT | Generic Board | *2.1.0* |  |