Fix missing bracket in presence guide (#4664)
Fix missing bracket in presence guide (#4664)


phoenixframework/phoenix,phoenixframework/phoenix,rafbgarcia/phoenix,optikfluffel/phoenix,0x00evil/phoenix,nshafer/phoenix,rafbgarcia/phoenix,nshafer/phoenix,rafbgarcia/phoenix,optikfluffel/phoenix,0x00evil/phoenix,optikfluffel/phoenix,0x00evil/phoenix,phoenixframework/phoenix,nshafer/phoenix