add CI for wisblock_rak4631

Author: sabas1080

.github/workflows/compile-examples.yml

@@ -36,6 +36,7 @@ jobs:
         - fqbn: electroniccats:mbed:bastble
         - fqbn: electroniccats:mbed:bast_frontier
         - fqbn: electroniccats:mbed:rak_wistrio5010
+        - fqbn: electroniccats:mbed:wisblock_rak4631
 
         # compile only the examples compatible with each board
         include:
@@ -48,6 +49,9 @@ jobs:
           - board:
               fqbn: electroniccats:mbed:rak_wistrio5010
             additional-sketch-paths: '"libraries/ThreadDebug"'
+          - board:
+              fqbn: electroniccats:mbed:wisblock_rak4631
+            additional-sketch-paths: '"libraries/ThreadDebug"'
 
     steps:
       - name: Checkout repository