Updated CONTRIBUTING.md: use --follow-tags option for push instead of pushing twice
Updated CONTRIBUTING.md: use --follow-tags option for push instead of pushing twice

opentable/oc,matteofigus/oc,federicomaffei/oc,matteofigus/oc,federicomaffei/oc,andyroyle/oc,NapoleanReigns/oc,NapoleanReigns/oc,andyroyle/oc,opentable/oc