Minecraft wiki entry for Development_versions, associated text: Can now ring bells.
Will now run into a nearby home when a bell is rung.
Can now be traded during raids again.
Will now sweat during raids.
Will celebrate when a raid has been cleared, by setting off fireworks and cheering.
Baby villagers now have biome-specific skins.
When a raid is defeated, the villagers will gift the player random items according to their profession: