Update SHA refs in UPDATING
Update SHA refs in UPDATING

imbstack/pushmanager,YelpArchive/pushmanager,YelpArchive/pushmanager,bchess/pushmanager,Yelp/pushmanager,asottile/pushmanager,bchess/pushmanager,Yelp/pushmanager,bis12/pushmanager,bis12/pushmanager,Yelp/pushmanager,asottile/pushmanager,YelpArchive/pushmanager,bis12/pushmanager,Yelp/pushmanager,YelpArchive/pushmanager,imbstack/pushmanager,bchess/pushmanager,asottile/pushmanager,imbstack/pushmanager