Fix bad readme.go.md in azuredata (#9370)

* Fix bad readme.go.md in azuredata

* Fix comments

specification/azuredata/resource-manager/readme.go.md

@@ -6,14 +6,21 @@ These settings apply only when `--go` is specified on the command line.
 go:
   license-header: MICROSOFT_APACHE_NO_VERSION
   clear-output-folder: true
+  namespace: azuredata
 ```
 
-### Tag: package-2019-07-24 and go
+### Go multi-api
 
-These settings apply only when `--tag=package-2019-07-24 --go` is specified on the command line.
-Please also specify `--go-sdks-folder=<path to the root directory of your azure-sdk-for-go clone>`.
+``` yaml $(go) && $(multiapi)
+batch:
+  - tag: package-preview-2019-07
+```
+
+### Tag: package-preview-2019-07 and go
+
+These settings apply only when `--tag=package-preview-2019-07 --go` is specified on the command line.
+Please also specify `--go-sdk-folder=<path to the root directory of your azure-sdk-for-go clone>`.
 
-```yaml $(tag) == 'package-2019-07-24' && $(go)
-namespace: Microsoft.AzureData
-output-folder: $(go-sdks-folder)/services/preview/$(namespace)/mgmt/2019-07-24-preview/$(namespace)
+```yaml $(tag) == 'package-preview-2019-07' && $(go)
+output-folder: $(go-sdk-folder)/services/preview/$(namespace)/mgmt/2019-07-24-preview/$(namespace)
 ```