message: fix Go SDK package path for mariadb stable release
diff: @@ -31,5 +31,5 @@ These settings apply only when `--tag=package-2018-06-01 --go` is specified on t
  Please also specify `--go-sdk-folder=<path to the root directory of your azure-sdk-for-go clone>`.
  ``` yaml $(tag) == 'package-2018-06-01' && $(go)
  -output-folder: $(go-sdk-folder)/services/stable/$(namespace)/mgmt/2018-06-01/$(namespace)
  +output-folder: $(go-sdk-folder)/services/$(namespace)/mgmt/2018-06-01/$(namespace)
  ```
  