Fix a bug

Author: lizekai-richard

dd_ranking/__init__.py

@@ -1,5 +1,5 @@
 from .aug import DSA, Mixup, Cutmix, ZCAWhitening
 from .config import Config
 from .loss import KLDivergenceLoss, SoftCrossEntropyLoss
-from .metrics import HardScoreEvaluator, SoftLabelEvaluator, GeneralEvaluator
+from .metrics import HardLabelEvaluator, SoftLabelEvaluator, GeneralEvaluator
 from .utils import get_dataset, build_model, get_convnet, get_lenet, get_resnet, get_vgg, get_alexnet