Update README to refer to marine_acoustic_msgs

Author: amarburg

README.md

@@ -111,7 +111,7 @@ Other files/classes:
 
 * [sonar_image_proc](https://github.com/apl-ocean-engineering/sonar_image_proc) contains code to postprocess sonar data, including drawing the sonar data to an OpenCV Mat (contains both a ROS node and non-ROS library).
 * [oculus_sonar_driver](https://gitlab.com/apl-ocean-engineering/oculus_sonar_driver) provides a ROS node for interfacing with the Oculus sonar.
-* [acoustic_msgs](https://github.com/apl-ocean-engineering/hydrographic_msgs/tree/main/acoustic_msgs) defines the ROS [SonarImage](https://github.com/apl-ocean-engineering/hydrographic_msgs/blob/main/acoustic_msgs/msg/SonarImage.msg) message type published by [oculus_sonar_driver](https://gitlab.com/apl-ocean-engineering/oculus_sonar_driver).
+* [marine_acoustic_msgs](https://github.com/apl-ocean-engineering/marine_msgs/tree/main/marine_acoustic_msgs) defines the ROS [ProjectedSonarImage](https://github.com/apl-ocean-engineering/marine_msgs/blob/main/marine_acoustic_msgs/msg/ProjectedSonarImage.msg) message type published by [oculus_sonar_driver](https://gitlab.com/apl-ocean-engineering/oculus_sonar_driver).
 * [rqt_sonar_image_view](https://github.com/apl-ocean-engineering/rqt_sonar_image_view) is an Rqt plugin for displaying sonar imagery (uses [sonar_image_proc](https://github.com/apl-ocean-engineering/sonar_image_proc))
 
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