message: add Configuration heading to confidentialledger data-plane readme
diff: @@ -11,6 +11,8 @@ Please look to the files `Microsoft.ConfidentialLedger/stable/2022-05-13/confide
  > see https://aka.ms/autorest
  +## Configuration
  +
  ### Tag: package-0.1-preview-ledger
  These settings apply only when `--tag=package-0.1-preview-ledger` is specified on the command line.
  