Reword longpoll options (#4866)
Reword longpoll options (#4866)

This clear the confusion of setting the value to `10_000ms` where we
should be using `10_000`.
phoenixframework/phoenix,phoenixframework/phoenix,rafbgarcia/phoenix,0x00evil/phoenix,0x00evil/phoenix,optikfluffel/phoenix,optikfluffel/phoenix,optikfluffel/phoenix,phoenixframework/phoenix,0x00evil/phoenix,rafbgarcia/phoenix,rafbgarcia/phoenix