[ReleasePR sdk/billing/mgmt-v2018_03_01_preview] [Billing] update readme as feature request#16751

openapi-sdkautomation[bot] wants to merge 1 commit intoAzure:masterAzure/azure-sdk-for-java:masterfrom

AzureSDKAutomation:sdkAutomation/sdk_billing_mgmt-v2018_03_01_previewAzureSDKAutomation/azure-sdk-for-java:sdkAutomation/sdk_billing_mgmt-v2018_03_01_previewCopy head branch name to clipboard