doc: improve new-version manual
doc: improve new-version manual

djipko/rdopkg,openstack-packages/rdopkg,openstack-packages/rdopkg,Akasurde/rdopkg,Akasurde/rdopkg,djipko/rdopkg,hguemar/rdopkg,hguemar/rdopkg,redhat-openstack/rdopkg,redhat-openstack/rdopkg