Use 'list' instead of 'array' in the description

Author: Shotaro Kohama

src/sagemaker/session.py

@@ -195,7 +195,7 @@ def train(self, image, input_mode, input_config, role, job_name, output_config,
                     a directory in the Docker container.
                 * 'Pipe' - Amazon SageMaker streams data directly from S3 to the container via a Unix-named pipe.
 
-            input_config (list): An array of Channel objects. Each channel is a named input source. Please refer to
+            input_config (list): A list of Channel objects. Each channel is a named input source. Please refer to
                  the format details described:
                  https://botocore.readthedocs.io/en/latest/reference/services/sagemaker.html#SageMaker.Client.create_training_job
             role (str): An AWS IAM role (either name or full ARN). The Amazon SageMaker training jobs and APIs