param error in video_classification_frozen/eval.py

[wnzhyee]

https://github.com/facebookresearch/jepa/blob/69f2ae1519c8844581c8a1f3db0f34f4287a6011/evals/video_classification_frozen/eval.py#L98

this line should be eval_frame_step = args_data.get('frame_step', 4) cause of args_pretrain does not have frame_step param in config.yaml