Correct formatting of ceph doc

[rajathere]

The yaml block was not formatted within example causing it to be formatted as a paragraph in a single line.

[openshift-ci]

Hi @rajathere. Thanks for your PR.

I'm waiting for a openstack-k8s-operators member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[Akrog]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Akrog, rajathere

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