Update app.yaml
Update app.yaml

JonGal/appengine-ml-demo,dmolson/appengine-guestbook-python,jerarl/gcp-appengine-python,t9nf/appengine-guestbook-python,jeffgodwyll/appengine-flask-guestbook,wcyuan/weather-mailer,bkeyvani/appengine-guestbook-python,Romzz/appengine-guestbook-python,adjohnson916/appengine-guestbook-python,t9nf/appengine-guestbook-python,JackConnor/portfolio,ashwini0529/appengine-guestbook-python,bkeyvani/appengine-guestbook-python,artificechicago/camp2016,Romzz/appengine-guestbook-python,GoogleCloudPlatform/appengine-guestbook-python,JonGal/appengine-ml-demo,GoogleCloudPlatform/appengine-guestbook-python,jeffgodwyll/appengine-flask-guestbook,artificechicago/camp2016,JackConnor/portfolio,wcyuan/weather-mailer,adjohnson916/appengine-guestbook-python,ashwini0529/appengine-guestbook-python,thejeshgn/appengine-guestbook-python,thejeshgn/appengine-guestbook-python,dmolson/appengine-guestbook-python,jerarl/gcp-appengine-python