fix quickstart

docs/quick_start.md

@@ -42,7 +42,7 @@ train_dataset = pdx.datasets.ImageNet(
     shuffle=True)
 eval_dataset = pdx.datasets.ImageNet(
     data_dir='vegetables_cls',
-    file_list='vegetables_cls/train_list.txt',
+    file_list='vegetables_cls/val_list.txt',
     label_list='vegetables_cls/labels.txt',
     transforms=eval_transforms)
 ```