go.talks/goforc.slide: fix typos
go.talks/goforc.slide: fix typos

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/6782087

Karthikvb/talks,Karthikvb/talks,Karthikvb/talks,Karthikvb/talks,Karthikvb/talks,Karthikvb/talks