uncorrected error in template

[a-b-v]

Describe the bug

Commit here 63a5b2d

The helm output is
Error: template: log-router/templates/secret.yaml:21:34: executing "log-router/templates/secret.yaml" at : wrong type for value; expected string; got map[string]interface {}

Reproduction steps

--set fluentd.extraEnv.elk_hosts="172.17.10.36:9200,172.17.10.37:9200,172.17.10.38:9200"

Expected behavior

Helm must process the release without errors

Additional context

No response