docs: add docs for cephfs

- specifically related to managing csi volumes for kubernetes

doc/ceph/README.md

@@ -31,6 +31,8 @@ Always refer back to the official documentation at https://docs.ceph.com/en/late
 
 ## managing cephfs with subvolumes
 
+This will:
+
 Create erasure code profiles. The K and M values are equivalent to the number of data disks (K) and parity disks (M) in RAID5, RAID6, etc.
 
     sudo ceph osd erasure-code-profile set ec_6_2 k=6 m=2