doc: Add JsonGet v2 deprecation (#2720)

Co-authored-by: Navin Soni <[email protected]>

Author: jkroll-aws

doc/v2.rst

@@ -265,6 +265,12 @@ Please use :func:`sagemaker.s3.parse_s3_url` instead.
 
 The class ``sagemaker.session.ModelContainer`` has been deprecated, as it is not needed for creating inference pipelines.
 
+``sagemaker.workflow.condition_step.JsonGet``
+---------------------------------------------
+
+The class ``sagemaker.workflow.condition_step.JsonGet`` has been deprecated.
+Please use :class:`sagemaker.workflow.functions.JsonGet` instead.
+
 Parameter and Class Name Changes
 ================================