spec: fix fmt issues and example JSON
spec: fix fmt issues and example JSON

tangle329/cni,NeilW/cni,Symmetric/cni,containernetworking/cni,luxas/cni,NeilW/cni,squaremo/cni,containernetworking/cni,tomdee/cni,containernetworking/plugins,jonboulle/cni,dcbw/cni,Symmetric/cni,jonboulle/cni,tomdee/cni,rosenhouse/cni,achanda/cni,kad/cni,dcbw/cni,appc/cni,squeed/plugins,containernetworking/plugins,mcastelino/cni,rosenhouse/cni,appc/cni,steveeJ/cni,aanm/cni,squeed/plugins,luxas/cni,murat1985/cni,tangle329/cni,murat1985/cni,aanm/cni,steveeJ/cni,kad/cni,achanda/cni,mcastelino/cni,squaremo/cni