Fix RTOS internal API Doxygen documentation (#7)

hugueskamba · hugueskamba · commit fc48e434e2f4 · 2019-07-03T11:59:57.000+01:00
diff --git a/rtos/internal/rtos_idle.h b/rtos/internal/rtos_idle.h
@@ -30,7 +30,7 @@ extern "C" {
 
 
 /** \ingroup rtos */
-/** \addtogroup mbed-os-internal */
+/** \addtogroup rtos-internal-api Internal API */
 /** @{*/
 
 /**
