AP_DDS: Rally set altitude integer

Author: tizianofiorenzani

libraries/AP_DDS/README.md

@@ -299,9 +299,9 @@ The `altitude_frame` specifies the datum for the altitude, among Home, Absolute,
 (use the enumerator specified in the message definition).
 
 ```bash
-ros2 service call /ap/rally_set ardupilot_msgs/srv/RallySet "{rally: {altitude_frame: 1,  point: {latitude: -35.12345, longitude: 151.12345, altitude: 400.5}}}"
+ros2 service call /ap/rally_set ardupilot_msgs/srv/RallySet "{rally: {altitude_frame: 1,  point: {latitude: -35.12345, longitude: 151.12345, altitude: 400}}}"
 
-requester: making request: ardupilot_msgs.srv.RallySet_Request(rally=ardupilot_msgs.msg.Rally(point=geographic_msgs.msg.GeoPoint(latitude=-35.12345, longitude=151.12345, altitude=400.5), altitude_frame=1), clear=False)
+requester: making request: ardupilot_msgs.srv.RallySet_Request(rally=ardupilot_msgs.msg.Rally(point=geographic_msgs.msg.GeoPoint(latitude=-35.12345, longitude=151.12345, altitude=400.0), altitude_frame=1), clear=False)
 
 response:
 ardupilot_msgs.srv.RallySet_Response(success=True, size=1)