seems that we need to modify the discovery query

[nodebrand]

1. Problem: The discovery query might be incorrect

2024-05-24T10:49:31.088750Z INFO network::peer_manager: Peer statistics connected=0 target=50 outbound=0
2024-05-24T10:49:31.088789Z DEBUG network::peer_manager: Starting a new peer discovery query connected=0 target=50 outbound=0 wanted=16
2024-05-24T10:49:31.088810Z DEBUG network::discovery: Starting a peer discovery request target_peers=16
2024-05-24T10:49:31.786256Z WARN discv5::service: No known_closest_peers found. Return empty result without sending query.
2024-05-24T10:49:31.786331Z DEBUG network::discovery: Discovery query yielded no results.

2. Environment
   OS: Ubuntu 22.04.4 LTS
   cargo: 1.75.0
   rustc 1.75.0 (82e1608df 2023-12-21)