message: storagecache add batch tag
diff: @@ -13,6 +13,7 @@ go:
  ``` yaml $(go) && $(multiapi)
  batch:
  + - tag: package-2021-09
  - tag: package-2021-05
  - tag: package-2021-03
  - tag: package-2020-10-01
  @@ -21,6 +22,15 @@ batch:
  - tag: package-2019-08
  ```
  +### Tag: package-2021-09 and go
  +
  +These settings apply only when `--tag=package-2021-09 --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-2021-09' && $(go)
  +output-folder: $(go-sdk-folder)/services/$(namespace)/mgmt/2021-09-01/$(namespace)
  +```
  +
  ### Tag: package-2021-05 and go
  These settings apply only when `--tag=package-2021-05 --go` is specified on the command line.
  