fix #767 - broken link on download page
fix #767 - broken link on download page

gocd/www.go.cd,gocd/gocd.github.io,ketan/www.go.cd,ketan/gocd.github.io,jyotisingh/www.go.cd,ketan/gocd.github.io,ketan/gocd.github.io,gocd/gocd.github.io,ketan/www.go.cd,jyotisingh/www.go.cd,gocd/www.go.cd,gocd/gocd.github.io,jyotisingh/www.go.cd,ketan/www.go.cd,gocd/gocd.github.io,GaneshSPatil/www.go.cd,GaneshSPatil/www.go.cd,GaneshSPatil/www.go.cd,gocd/www.go.cd,GaneshSPatil/www.go.cd,gocd/www.go.cd