[Docs]in the RTMW3D project, How to map the ubody3d dataset to the coco_133 format

[crazy1z]

📚 The doc issue

In the configuration file of the rtmpose3d project, the ubody_coco133 mapping is missing. I used dataset_converters script to convert to ubody dataset with 137 keypoints.

Suggest a potential alternative/fix

Add the mapping data or give the annotations file.