Reference B-L072Z-LRWAN1 for the next release in README.md

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

Author: fpistm

Diff for: README.md

@@ -54,10 +54,13 @@ For advanced user, you can use the repository: see the [Using git repository](ht
   * STM32F1
     * BluePill F103C8 (on going)
     * MapleMini F103CB (on going)
+
   * STM32F3
     * [Nucleo F302R8](http://www.st.com/en/evaluation-tools/nucleo-f302r8.html)
     * [Nucleo F303K8](http://www.st.com/en/evaluation-tools/nucleo-f303k8.html)
 
+  * STM32L0
+    * [B-L072Z-LRWAN1](http://www.st.com/en/evaluation-tools/b-l072z-lrwan1.html)
 
 ## Troubleshooting