Minor addition to Materialize help text.
Minor addition to Materialize help text.

Signed-off-by: Jacques Grove <cd08d3adda01607dd857ba479d6e291b9b358911@gmail.com>

mahak/vitess,mahak/vitess,mahak/vitess,tinyspeck/vitess,tinyspeck/vitess,tinyspeck/vitess,tinyspeck/vitess,tinyspeck/vitess,mahak/vitess,vitessio/vitess,mahak/vitess,tinyspeck/vitess,vitessio/vitess,vitessio/vitess,vitessio/vitess,mahak/vitess,mahak/vitess,vitessio/vitess,vitessio/vitess,vitessio/vitess,vitessio/vitess,mahak/vitess,tinyspeck/vitess