Error in human and garment pose training scripts

[AnasKunda]

There is a small bug in train.py script of human and garment pose models.

The bug is present in below lines:

for test_keypoints in test_dataloader:
            model.eval()
            test_predictions, _ = model(test_keypoints)

The correction should be:

for test_keypoints, _ in test_dataloader:
            model.eval()
            test_predictions, _ = model(test_keypoints)