docs: Fix incorrect description of copy method (#1821)

* docs: Fix typo

* docs: Fix incorrect description of copy method

* changes: Add changes description file

* docs: Add space before parentheses

Co-authored-by: PrettyWood <em.jolibois@gmail.com>

Co-authored-by: PrettyWood <em.jolibois@gmail.com>

changes/1821-KimMachineGun.md

@@ -0,0 +1 @@
+Fix typo in the anchor of exporting_models.md#modelcopy and incorrect description.

docs/usage/models.md

@@ -71,7 +71,7 @@ Models possess the following methods and attributes:
   cf. [exporting models](exporting_models.md#modeljson)
 
 `copy()`
-: returns a deep copy of the model; cf. [exporting models](exporting_models.md#modeldcopy)
+: returns a copy (by default, shallow copy) of the model; cf. [exporting models](exporting_models.md#modelcopy)
 
 `parse_obj()`
 : a utility for loading any object into a model with error handling if the object is not a dictionary;