Minor fix on volume configuration example
Minor fix on volume configuration example

Signed-off-by: Erdoan Hadzhiyusein <b55197bd08abe5f2d7318bea158beb45d9e41502@gmail.com>

vjuranek/docker-maven-plugin,fabric8io/docker-maven-plugin,fabric8io/docker-maven-plugin,fabric8io/docker-maven-plugin,vjuranek/docker-maven-plugin,vjuranek/docker-maven-plugin,rhuss/docker-maven-plugin,rhuss/docker-maven-plugin