Update examples

Author: sea-bass

examples/fibonacci_client.html renamed to examples/fibonacci_action_client.html

@@ -135,7 +135,7 @@ <h1>Simple roslib Example</h1>
   <ol>
     <li><tt>ros2 topic pub /listener std_msgs/msg/String "{ data: 'hello world' }" </tt></li>
     <li><tt>ros2 topic echo /cmd_vel</tt></li>
-    <li><tt>ros2 run rclpy_tutorials add_two_ints_server_py</tt></li>
+    <li><tt>ros2 run demo_nodes_py add_two_ints_server</tt></li>
     <li><tt>ros2 launch rosbridge_server rosbridge_websocket_launch.xml</tt></li>
   </ol>
   <div id="statusIndicator">