fix documentation inconsistency for volume create
fix documentation inconsistency for volume create

the example command uses `/world` but the description refers to `/src`

Signed-off-by: Harold Cooper <9ab5e4b68c3ae9d240fa7fd49ec0a36261f21f36@gmail.com>
(cherry picked from commit f67da614e9963e626d4ec12fd624249947b97d6a)

solanolabs/docker,solanolabs/docker,solanolabs/docker