fix: Resolve create_model() TypeError in Partial class (#801)

instructor/dsl/partial.py

@@ -83,12 +83,14 @@ def get_partial_model(cls) -> type[T_Model]:
             cls, BaseModel
         ), f"{cls.__name__} must be a subclass of BaseModel"
 
+        model_name = (
+            cls.__name__
+            if cls.__name__.startswith("Partial")
+            else f"Partial{cls.__name__}"
+        )
+
         return create_model(
-            __model_name=(
-                cls.__name__
-                if cls.__name__.startswith("Partial")
-                else f"Partial{cls.__name__}"
-            ),
+            model_name,
             __base__=cls,
             __module__=cls.__module__,
             **{
@@ -289,12 +291,14 @@ def _wrap_models(field: FieldInfo) -> tuple[object, FieldInfo]:
                 tmp_field.annotation = Partial[annotation]
             return tmp_field.annotation, tmp_field
 
+        model_name = (
+            wrapped_class.__name__
+            if wrapped_class.__name__.startswith("Partial")
+            else f"Partial{wrapped_class.__name__}"
+        )
+
         return create_model(
-            __model_name=(
-                wrapped_class.__name__
-                if wrapped_class.__name__.startswith("Partial")
-                else f"Partial{wrapped_class.__name__}"
-            ),
+            model_name,
             __base__=(wrapped_class, PartialBase),
             __module__=wrapped_class.__module__,
             **{