mention pipeline flag in hijack/watch docs
mention pipeline flag in hijack/watch docs

concourse/concourse,Amit-PivotalLabs/concourse,holgero/concourse,longnguyen11288/concourse,concourse/concourse,CloudCredo/concourse,holgero/concourse,squeedee/concourse,concourse/concourse,CloudCredo/concourse,longnguyen11288/concourse,cjcjameson/concourse,holgero/concourse,concourse/concourse,beni55/concourse,CloudCredo/concourse,zachgersh/concourse,Amit-PivotalLabs/concourse,zachgersh/concourse,squeedee/concourse,squeedee/concourse,longnguyen11288/concourse,sedouard/concourse,sedouard/concourse,concourse/concourse,cjcjameson/concourse,beni55/concourse,beni55/concourse,Amit-PivotalLabs/concourse,cjcjameson/concourse,sedouard/concourse,zachgersh/concourse