Update doc

include/sta/rtos2/watchdog.hpp

@@ -105,6 +105,17 @@ namespace sta
 	 * @ingroup rtos2Watchdog
 	 */
 	void notifyWatchdog(uint32_t flags);
+
+
+	/**
+	 * @brief Handler for watchdog events.
+	 *
+	 * Must be implemented by application.
+	 *
+	 * @param arg   Watchdog task argument
+	 * @param flags Event flags
+	 */
+	void watchdogEventHandler(void * arg, uint32_t flags);
 } // namespace sta