Nope, the recommendation is 6 months. It was updated earlier this year. It is not currently under review. It has not changed.

The reason it's 6 months isn't really anything to do with allergies, it's about ensuring babies get optimal nutrition and *don't* displace breastmilk with other foods until they're ready.
Babies' iron stores begin to deplete sometime after 6 months, so sometime in the 2nd half of their first year most babies will need a complementary source of iron. But this still doesn't necessarily mean babies need to be eating masses of food early on as breastmilk still provides the best and most complete nutrition until 12 months.