generate-rook-csv.sh: fix printed examples
generate-rook-csv.sh: fix printed examples

0fc3775b990d0c79356be33f8fc8416a897560fc added new Makefile target
'csv-ceph', but printed examples refers to non-existing target 'csv'.

This commit fixes this inconsistency.

Signed-off-by: Mateusz Gozdek <13f764135ff35d07236cdb9e39f2edb4395b2583@gmail.com>

rook/rook,rook/rook,rook/rook,rook/rook,rook/nfs,rook/nfs,rook/nfs,rook/rook