Update docs domain name
Update docs domain name

Summary: Update CNAME for domain.

Reviewed By: priteshrnandgaonkar

Differential Revision: D9087229

fbshipit-source-id: 325df300e23c87384503929c506ba690e61b8da1

facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper