fix: modify dual_ekf_navsat_example.launch file to remap the correct …

…imu topic (#857)

launch/dual_ekf_navsat_example.launch.py

@@ -56,7 +56,7 @@ def generate_launch_description():
             name='navsat_transform',
 	        output='screen',
             parameters=[parameters_file_path],
-            remappings=[('imu/data', 'imu/data'),
+            remappings=[('imu', 'imu/data'),
                         ('gps/fix', 'gps/fix'), 
                         ('gps/filtered', 'gps/filtered'),
                         ('odometry/gps', 'odometry/gps'),