Add the NUCLEO-F411RE board to the README.md

Signed-off-by: Frederic.Pillon <[email protected]>

Author: fpistm

Diff for: README.md

@@ -17,6 +17,7 @@ Boards available:
 
   * STM32F4
     * [Nucleo F401RE](http://www.st.com/en/evaluation-tools/nucleo-f401re.html)
+    * [Nucleo F411RE](http://www.st.com/en/evaluation-tools/nucleo-f411re.html)
     * [Nucleo F429ZI](http://www.st.com/en/evaluation-tools/nucleo-f429zi.html)
     * [STM32F407G-DISC1](http://www.st.com/en/evaluation-tools/stm32f4discovery.html)