message: update netapp readme.java.md
diff: @@ -33,7 +33,7 @@ Please also specify the `--azure-libraries-for-java-folder=<path to the root dir
  ``` yaml $(tag) == 'package-netapp-2020-06-01' && $(java) && $(multiapi)
  java:
  - namespace: com.microsoft.azure.management.netapp.v2020_02_01
  + namespace: com.microsoft.azure.management.netapp.v2020_06_01
  output-folder: $(azure-libraries-for-java-folder)/sdk/netapp/mgmt-v2020_06_01
  regenerate-manager: true
  generate-interface: true
  