man page: fixed a word repetition
man page: fixed a word repetition

Change-Id: I97ed210a016eb04f2b9c865a4aa75ec5c402800f
Signed-off-by: Sandro Bonazzola <fcb014d63786651910af5db2ecc5316c668188ef@redhat.com>

oVirt/ovirt-image-uploader,oVirt/ovirt-image-uploader,oVirt/ovirt-image-uploader