Fix lint

Author: Abacn

sdks/python/apache_beam/typehints/row_type_test.py

@@ -17,9 +17,9 @@
 
 """Unit tests for the Beam Row typing functionality."""
 
-from dataclasses import dataclass
 import typing
 import unittest
+from dataclasses import dataclass
 
 import apache_beam as beam
 from apache_beam.testing.test_pipeline import TestPipeline