Description of problem:

Update observability_enable.adoc to correct indentation of secret:
With the secret yaml file mentioned in step 7. Attach the policies to the role of section https://docs.redhat.com/en/documentation/red_hat_advanced_cluster_management_for_kubernetes/2.13/html-single/observability/index#generate-access-keys we were getting:

error: error parsing thanos.yaml: error converting YAML to JSON: yaml: line 8: did not find expected key
After correcting the indentation the error has been resolved.

Version-Release number of selected component (if applicable):

• 2.12 , 2.14 and further.

How reproducible:

[1]https://docs.redhat.com/en/documentation/red_hat_advanced_cluster_management_for_kubernetes/2.13/html-single/observability/index#generate-access-keys

Use the same yaml mentioned in 7th steps of DOC [1]

Steps to Reproduce:

3. ...

Actual results:

error: error parsing thanos.yaml: error converting YAML to JSON: yaml: line 8: did not find expected key

Expected results:

It should not throw any error

Additional info:

Created a PR: https://github.com/stolostron/rhacm-docs/pull/8082, please do the needfull.