fix interface of abs class base Descriptor

deepmd_pt/model/descriptor/descriptor.py

@@ -84,9 +84,9 @@ def init_desc_stat(self, sumr, suma, sumn, sumr2, suma2):
     @abstractmethod
     def forward(
         self,
-        nlist,
         extended_coord,
         extended_atype,
+        nlist,
         mapping: Optional[torch.Tensor] = None,
     ):
         """Calculate descriptor.