fix: lint error return none

Author: fabclmnt

src/datascience/ydata/datascience/common/anonymizer.py

@@ -72,7 +72,7 @@ def get_anonymizer_type(name) -> "AnonymizerType":
       if name.upper() in AnonymizerType._member_names_:
         return AnonymizerType[name.upper()]
       else:
-        return
+        return None
 
     if isinstance(name, int):
       return AnonymizerType(name)