help request: Logstash_Prefix_Separator

[buxiaomo]

Describe the issue

how can I use Logstash_Prefix_Separator on fluentbit ClusterOutput

How did you install fluent operator?

helm

Additional context

No response

[buxiaomo]

my ClusterOutput

...
spec:
  es: 
    host: 172.16.2.11
    port: 9200
    logstashFormat: true
    logstashPrefix: demo2-noprod

this output index is demo2-noprod-2023.06.21, I want index is demo2-noprod_2023.06.21