Change 'label' to 'id' in rest_api.md
Change 'label' to 'id' in rest_api.md

kylehogan/hil,henn/hil,SahilTikale/switchHaaS,meng-sun/hil,lokI8/haas,CCI-MOC/haas,henn/hil_sahil,kylehogan/hil,meng-sun/hil,apoorvemohan/haas,henn/hil,SahilTikale/haas,henn/haas,kylehogan/haas,apoorvemohan/haas,henn/hil_sahil