fix function call

Author: sfluegel05

chebai_graph/preprocessing/datasets/chebi.py

@@ -130,7 +130,7 @@ def enc_if_not_none(encode, value):
 
         # augment molecule graph if possible (this would also happen for the properties if needed, but this avoids redundancy)
         if isinstance(self.reader, _AugmentorReader):
-            returned_results = [self._create_augmented_graph(mol) for mol in features]
+            returned_results = [self.reader._create_augmented_graph(mol) for mol in features]
             mols = [augmented_mol[1] for augmented_mol in returned_results if augmented_mol is not None]
         else:
             mols = features