fixing docstring formatting

Author: Lokiiiiii

src/sagemaker/pytorch/estimator.py

@@ -231,6 +231,7 @@ def __init__(
                         When you use this PyTorch XLA option for distributed training strategy,
                         you must add the ``compiler_config`` parameter and activate SageMaker
                         Training Compiler.
+                        
                 compiler_config (:class:`~sagemaker.pytorch.TrainingCompilerConfig`):
                 Configures SageMaker Training Compiler to accelerate training.