fix: python11 Union using | syntax in PydanticInputObjectType

Author: arun-sureshkumar

graphene_pydantic/inputobjecttype.py

@@ -45,13 +45,9 @@ def construct_fields(
 
     fields = {}
     for name, field in fields_to_convert:
-        declared_type = getattr(field, "annotation", None)
 
-        # Ignore Union types from Input. Refer https://github.com/graphql/graphql-spec/issues/488
-        if isinstance(declared_type, UnionType) or (
-                hasattr(declared_type, "__origin__") and declared_type.__origin__ == T.Union
-        ):
-            continue
+        if isinstance(getattr(field, "annotation", None), UnionType):
+            field.annotation = T.Union[getattr(field, "annotation", None).__args__]
 
         converted = convert_pydantic_input_field(
             field, registry, parent_type=obj_type, model=model