Fix docstrings to reference datatype as it would be used for users

src/ifcopenshell-python/ifcopenshell/api/classification/add_reference.py

@@ -66,11 +66,11 @@ class Usecase:
 
         :param product: The list of IFC objects, properties, or resources you want to
             associate the classification reference to.
-        :type product: list[ifcopenshell.entity_instance.entity_instance]
+        :type product: list[ifcopenshell.entity_instance]
         :param reference: The classification reference entity taken from an
             IFC classification library. If you supply this parameter, you will
             use option 2.
-        :type reference: ifcopenshell.entity_instance.entity_instance, optional
+        :type reference: ifcopenshell.entity_instance, optional
         :param identification: If you choose option 1 and do not specify a
             reference, you may manually specify an identification code. The code
             is typically a short identifier and may have punctuation to separate
@@ -82,7 +82,7 @@ class Usecase:
         :param classification: The IfcClassification entity in your IFC model
             (not the library, if you are doing option 2) that the reference is
             part of.
-        :type classification: ifcopenshell.entity_instance.entity_instance
+        :type classification: ifcopenshell.entity_instance
         :param is_lightweight: If you are doing option 2, choose whether or not
             to only add that particular reference (lighweight) or also add all
             of its parent references in the classification hierarchy (not
@@ -98,7 +98,7 @@ class Usecase:
 
         :return: The newly added IfcClassificationReference
             or `None` if `products` was empty list.
-        :rtype: Union[ifcopenshell.entity_instance.entity_instance, None]
+        :rtype: Union[ifcopenshell.entity_instance, None]
 
         Example: