Update src/stepfunctions/steps/sagemaker.py parameters description

Co-authored-by: Adam Wong <[email protected]>

Author: ca-nguyen

src/stepfunctions/steps/sagemaker.py

@@ -503,10 +503,9 @@ def __init__(self, state_id, processor, job_name, inputs=None, outputs=None, exp
                 The KmsKeyId is applied to all outputs.
             wait_for_completion (bool, optional): Boolean value set to `True` if the Task state should wait for the processing job to complete before proceeding to the next step in the workflow. Set to `False` if the Task state should submit the processing job and proceed to the next step. (default: True)
             tags (list[dict] or Placeholder, optional): `List to tags <https://docs.aws.amazon.com/sagemaker/latest/dg/API_Tag.html>`_ to associate with the resource.
-            parameters(dict, optional): The value of this field becomes the request for the
-                `CreateProcessingJob<https://docs.aws.amazon.com/sagemaker/latest/APIReference/API_CreateProcessingJob.html>`_ created by the processing step.
-                All parameters fields are compatible with `Placeholders<https://aws-step-functions-data-science-sdk.readthedocs.io/en/stable/placeholders.html?highlight=placeholder#stepfunctions.inputs.Placeholder>`_.
-                Any value defined in the parameters argument will overwrite the ones defined in the other arguments, including properties that were previously defined in the processor.
+            parameters(dict, optional): The value of this field is merged with other arguments to become the request payload for SageMaker `CreateProcessingJob<https://docs.aws.amazon.com/sagemaker/latest/APIReference/API_CreateProcessingJob.html>`_. 
+                You can use `parameters` to override the value provided by other arguments and specify any field's value dynamically using `Placeholders<https://aws-step-functions-data-science-sdk.readthedocs.io/en/stable/placeholders.html?highlight=placeholder#stepfunctions.inputs.Placeholder>`_.
+
         """
         if wait_for_completion:
             """