message: add LUIS runtime runtime_3_0_preview to Go SDK
diff: @@ -14,6 +14,7 @@ go:
  ``` yaml $(go) && $(multiapi)
  batch:
  - tag: runtime_2_0
  + - tag: runtime_3_0_preview
  ```
  ### Tag: runtime_2_0 and go
  @@ -31,5 +32,5 @@ These settings apply only when `--tag=runtime_3_0_preview --go` is specified on
  Please also specify `--go-sdk-folder=<path to the root directory of your azure-sdk-for-go clone>`.
  ``` yaml $(tag) == 'runtime_3_0_preview' && $(go)
  -output-folder: $(go-sdk-folder)/services/cognitiveservices/v3.0-preview/luis/$(namespace)
  +output-folder: $(go-sdk-folder)/services/preview/cognitiveservices/v3.0/luis/$(namespace)
  ```
  