update migration guide (#15538)
update migration guide (#15538)


Azure/azure-sdk-for-java,Azure/azure-sdk-for-java,selvasingh/azure-sdk-for-java,Azure/azure-sdk-for-java,selvasingh/azure-sdk-for-java,Azure/azure-sdk-for-java,selvasingh/azure-sdk-for-java,Azure/azure-sdk-for-java