Update instructions for token authentication in comments (#2334)
Update instructions for token authentication in comments (#2334)

The instructions currently refer to the old way to passing passing
parameters on `socket.connect`. If folled, this results in a
warning message in the JS console that "passing params to connect is
deprecated. Instead pass :params to the Socket constructor", see
[`phoenix.js`](https://github.com/phoenixframework/phoenix/blob/master/assets/js/phoenix.js#L533).

This confused me as I was reading through this, so I've created an
update that points to the correct location for passing the token.
gjaldon/phoenix,Gazler/phoenix,korobkov/phoenix,CultivateHQ/phoenix,nshafer/phoenix,bsmr-erlang/phoenix,mschae/phoenix,jwarwick/phoenix,ericmj/phoenix,rafbgarcia/phoenix,nshafer/phoenix,trarbr/phoenix,mobileoverlord/phoenix,michalmuskala/phoenix,stevedomin/phoenix,nshafer/phoenix,mitchellhenke/phoenix,optikfluffel/phoenix,mschae/phoenix,rafbgarcia/phoenix,CultivateHQ/phoenix,keathley/phoenix,bsmr-erlang/phoenix,Kosmas/phoenix,keathley/phoenix,trarbr/phoenix,0x00evil/phoenix,evax/phoenix,optikfluffel/phoenix,pap/phoenix,mitchellhenke/phoenix,rafbgarcia/phoenix,ericmj/phoenix,0x00evil/phoenix,korobkov/phoenix,Kosmas/phoenix,stevedomin/phoenix,Gazler/phoenix,phoenixframework/phoenix,Joe-noh/phoenix,pap/phoenix,evax/phoenix,eksperimental/phoenix,eksperimental/phoenix,optikfluffel/phoenix,jwarwick/phoenix,gjaldon/phoenix,phoenixframework/phoenix,phoenixframework/phoenix,dmarkow/phoenix,dmarkow/phoenix,michalmuskala/phoenix,mobileoverlord/phoenix,Joe-noh/phoenix,0x00evil/phoenix