message: fix: java tag error
diff: @@ -26,7 +26,7 @@ batch:
  - tag: package-2018-01
  ```
  -### Tag: package-2020-01-preview and java
  +### Tag: package-2020-04-preview and java
  These settings apply only when `--tag=package-2020-04-preview --java` is specified on the command line.
  