Hard-coded namespaces for the extrinsics

[araju]

In ob_camera_node.cpp you are hardcoding the topics for the extrinsics, with a prepended "/" which makes it impossible to add additional namespaces to your node: https://github.com/orbbec/OrbbecSDK_ROS2/blob/main/orbbec_camera/src/ob_camera_node.cpp#L1457-L1485

The rest of the topics in the file are configured correctly and adhere to ROS2 norms. It's only the extrinsics that have this problem.

Can you change the extrinsics topics to follow the pattern used elsewhere in the file?

[jjiszjj]

@araju Hello,Thank you very much for your feedback.We will review and update this change in the near future.