fix: allow preview of drafts
fix: allow preview of drafts

see https://github.com/owid/owid-grapher/commit/ac389315cb3e28fc31f415d3001f2c48e0f8cb6e

owid/owid-grapher,OurWorldInData/owid-grapher,owid/owid-grapher,owid/owid-grapher,OurWorldInData/owid-grapher,owid/owid-grapher,OurWorldInData/owid-grapher,owid/owid-grapher,OurWorldInData/owid-grapher,OurWorldInData/owid-grapher