Returned labels of UCR&UEA datasets may be not numerical but str #39
Description
1. System Info
https://github.com/WenjieDu/TSDB/blob/main/tsdb/loading_funcs/ucr_uea_datasets.py#L56-L60
2. Information
- The official example scripts
- My own created scripts
3. Reproduction
data=tsdb.load_dataset('any of uea_ucr datasets')
4. Expected behavior
isinstance(data['y_train'][0], str) = True