doc: update nfs doc for Kerberos setup of ganesha in Ceph

Signed-off-by: Avan Thakkar <[email protected]>

Author: avanthakkar

doc/mgr/nfs.rst

@@ -326,7 +326,8 @@ allowed to be any complete path hierarchy between ``/`` and the ``EXPORT {path}`
 
 .. note:: Specifying values for sectype that require Kerberos will only function on servers
           that are configured to support Kerberos. Setting up NFS-Ganesha to support Kerberos
-          is outside the scope of this document.
+          can be found here `Kerberos setup for NFS Ganesha in Ceph <https://github.com/nfs-ganesha/nfs-ganesha/wiki/Kerberos-setup-for-NFS-Ganesha-in-Ceph>`_.
+
 
 .. note:: Export creation is supported only for NFS Ganesha clusters deployed using nfs interface.