Fix players not setting their nickname properly after the opening cutscene

src/main/java/emu/grasscutter/server/packet/recv/HandlerSetPlayerBornDataReq.java

@@ -48,6 +48,7 @@ public class HandlerSetPlayerBornDataReq extends PacketHandler {
 		
 		// Get player object
 		Player player = session.getPlayer();
+		player.setNickname(req.getNickName());
 
 		// Create avatar
 		if (player.getAvatars().getAvatarCount() == 0) {