Fix lint issue

Signed-off-by: Adrian Lundell <[email protected]>

Author: AdrianLundell

backends/cortex_m/test/tester.py

@@ -9,7 +9,10 @@
 
 import torch
 
-from backends.xnnpack.quantizer.xnnpack_quantizer import XNNPACKQuantizer, get_symmetric_quantization_config
+from backends.xnnpack.quantizer.xnnpack_quantizer import (
+    get_symmetric_quantization_config,
+    XNNPACKQuantizer,
+)
 from executorch.backends.arm.test.common import get_u55_compile_spec
 from executorch.backends.arm.test.tester.arm_tester import Serialize
 from executorch.backends.cortex_m.passes.quantized_op_fusion_pass import (