[pre-commit.ci] auto fixes from pre-commit.com hooks

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Author: pre-commit-ci[bot]

tests/batch/test_utils.py

@@ -5,6 +5,7 @@
 from ocf_datapipes.batch.utils import copy_batch_to_device, batch_to_tensor
 import pytest
 
+
 @pytest.fixture()
 def sample_numpy_batch():
     sample: NumpyBatch = {}