fix npz path

Author: Aria461863631

graphgallery/data/npz_dataset.py

@@ -18,7 +18,7 @@
 
 class NPZDataset(Dataset):
 
-    github_url = "https://raw.githubusercontent.com/EdisonLeeeee/GraphData/master/datasets/npz/{}.npz"
+    github_url = "https://raw.githubusercontent.com/EdisonLeeeee/GraphData/master/datasets/{}.npz"
     supported_datasets = _DATASETS
 
     def __init__(self, name: str,