Fix readme.go error

Author: pvsraviteja

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

@@ -20,13 +20,14 @@ batch:
   - tag: package-2019-03  
 ```
 
-### Tag: package-2020-09-01 and go
+### Tag: package-2020-09-01-preview and go
 
 These settings apply only when `--tag=package-2020-09-01-preview --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-2020-09-01-preview' && $(go)
 output-folder: $(go-sdk-folder)/services/preview/$(namespace)/mgmt/2020-09-01-preview/$(namespace)
+```
 
 ### Tag: package-2020-05-preview and go