Update test code

Author: VatsalGoel3

tests/unit/parser/_pydantic/test_appsync.py

@@ -1,8 +1,9 @@
+import pytest
+
 from aws_lambda_powertools.utilities.parser import parse, ValidationError
 from aws_lambda_powertools.utilities.parser.models import AppSyncResolverEventModel
 from tests.functional.utils import load_event
 
-
 def test_appsync_event_model_parses_successfully():
     """
     Validate that a valid AppSync resolver event is correctly parsed by the model.