[BUG][Opensearch] Inconsistent indentation in rendered templates

[smlx]

Describe the bug
The rendered templates for opensearch cause yamllint warnings due to inconsistent indentation.

To Reproduce
Steps to reproduce the behavior:

1. Run helm template --namespace opensearch opensearch ./charts/opensearch > /tmp/opensearch.yaml
2. Open /tmp/opensearch.yaml with and editor that has yamllint integration, or just run yamllint /tmp/opensearch.yaml
3. See indentation errors.

Expected behavior
The YAML should be well formed.

Chart Name
Opensearch

Screenshots
n/a

Host/Environment (please complete the following information):

• Helm Version: v3.6.2
• Kubernetes Version: 1.20.7

Additional context
n/a