cleanup: use block comment for ClusterInfo example
cleanup: use block comment for ClusterInfo example

Adjusted the mix of tabs and the spaces and also
used block comment for better readability.

Signed-off-by: Madhu Rajanna <60fbf37a92c2a0908e31296d18dadbec5a4dae17@gmail.com>

ceph/ceph-csi,ceph/ceph-csi,ceph/ceph-csi,ceph/ceph-csi