fix include example

Author: fabik111

Diff for: examples/ArduinoIoTCloud-NetConfig/thingProperties.h

@@ -4,7 +4,7 @@
 #error "This example is not compatible with this board."
 #endif
 #include <ArduinoIoTCloud.h>
-#include <Arduino_ConnectionHandler.h>
+#include <GenericConnectionHandler.h>
 #include "ConfiguratorAgents/agents/BLE/BLEAgent.h"
 #include "ConfiguratorAgents/agents/Serial/SerialAgent.h"