More vector migration

Author: CadeusTheGreat

content/en-us/chat/examples/proximity-chat.md

@@ -28,7 +28,7 @@ local function getPositionFromUserId(userId: number)
   end
 
   -- Return a default position if the player or character cannot be found.
-  return Vector3.zero
+  return vector.zero
 end
 
 -- Set the ShouldDeliverCallback for the general channel to control message delivery.