Do Goliaths get cold resistance?


There seems to be a discrepancy between sources for the Goliath’s ‘Mountain Born’ racial trait:

Volo’s Guide to Monsters says:

Mountain Born. You’re acclimated to high altitude, including elevations above 20,000 feet. You’re also naturally adapted to cold climates, as described in chapter 5 of the Dungeon Master’s Guide.

(Btw there is nothing in the Volo’s Errata to correct any of that)

D&D Beyond says:

Mountain Born. You have resistance to cold damage. You’re also acclimated to high altitude, including elevations above 20,000 feet.

Which is it?