fix: s3 model import

Author: heitorlessa

aws_lambda_powertools/utilities/parser/models/__init__.py

@@ -3,6 +3,7 @@
 from .dynamodb import DynamoDBStreamChangedRecordModel, DynamoDBStreamModel, DynamoDBStreamRecordModel
 from .event_bridge import EventBridgeModel
 from .kinesis import KinesisDataStreamModel, KinesisDataStreamRecord, KinesisDataStreamRecordPayload
+from .s3 import S3Model, S3RecordModel
 from .ses import SesModel, SesRecordModel
 from .sns import SnsModel, SnsNotificationModel, SnsRecordModel
 from .sqs import SqsModel, SqsRecordModel