message: Fix bad output-folder
diff: @@ -26,7 +26,7 @@ These settings apply only when `--tag=package-2020-05 --go` is specified on the
  Please also specify `--go-sdk-folder=<path to the root directory of your azure-sdk-for-go clone>`.
  ``` yaml $(tag) == 'package-2020-05' && $(go)
  -output-folder: $(go-sdk-folder)/services/preview/$(namespace)/mgmt/2020-05/$(namespace)
  +output-folder: $(go-sdk-folder)/services/preview/$(namespace)/mgmt/2020-05-01-preview/$(namespace)
  ```
  ### Tag: package-2018-11-preview and go
  