[ReleasePR track2_azure-mgmt-blockchain] update readme#22986

openapi-sdkautomation[bot] wants to merge 1 commit intoAzure:mainAzure/azure-sdk-for-python:mainfrom

AzureSDKAutomation:sdkAuto/track2_azure-mgmt-blockchainAzureSDKAutomation/azure-sdk-for-python:sdkAuto/track2_azure-mgmt-blockchainCopy head branch name to clipboard