message: move formrecognizer preview under preview directory
diff: @@ -22,5 +22,5 @@ These settings apply only when `--tag=release_1_0 --go` is specified on the comm
  Please also specify `--go-sdk-folder=<path to the root directory of your azure-sdk-for-go clone>`.
  ``` yaml $(tag) == 'release_1_0' && $(go)
  -output-folder: $(go-sdk-folder)/services/cognitiveservices/v1.0/$(namespace)
  +output-folder: $(go-sdk-folder)/services/preview/cognitiveservices/v1.0/$(namespace)
  ```
  \ No newline at end of file
  