Add missing comma to sentence describing which events are emitted by volt models in Readme.
Add missing comma to sentence describing which events are emitted by volt models in Readme.

orbitalimpact/crystal-meth,gabrielrios/volt,ASnow/volt,bbatsov/volt,dummey/volt,mzdunek93/volt,bglusman/volt,merongivian/volt,matthew342/volt,RickCarlino/volt,voltrb/volt,bglusman/volt,alexandred/volt,RickCarlino/volt,gabrielrios/volt,mzdunek93/volt,ahnbizcad/volt,sinventor/volt,alexandred/volt,jfahrer/volt,bglusman/volt,bbatsov/volt,orbitalimpact/crystal-meth,ahnbizcad/volt,dummey/volt,dummey/volt,jfahrer/volt,thyagobr/volt,CollaboTree/volt,RickCarlino/volt,ASnow/volt,dennym/volt,sinventor/volt,nightweb/volt,thyagobr/volt,ahnbizcad/volt,dennym/volt,Gaelan/volt,askl56/volt,voltrb/volt,thyagobr/volt,nightweb/volt,jfahrer/volt,mzdunek93/volt,sinventor/volt,orbitalimpact/crystal-meth,gabrielrios/volt,CollaboTree/volt,matthew342/volt,voltrb/volt,askl56/volt,merongivian/volt,Gaelan/volt,merongivian/volt,Gaelan/volt,nightweb/volt,CollaboTree/volt,ASnow/volt,bbatsov/volt,alexandred/volt,askl56/volt,matthew342/volt