[3.8] bpo-37488 : Document a warning for datetime.utcnow() and utcfromtimestamp() (GH-15773)#16059

miss-islington merged 1 commit intopython:3.8python/cpython:3.8from

miss-islington:backport-1a53c78-3.8miss-islington/cpython:backport-1a53c78-3.8Copy head branch name to clipboard