Use config value here instead of hardcoded time

[stringhandler]

found in v0.35.0

       match self.sync_peers(conn.clone()).await {
                        Ok(_) => continue,
                        Err(err @ NetworkDiscoveryError::PeerValidationError(_)) => {
                            warn!(target: LOG_TARGET, "{}. Banning peer.", err);
                            if let Err(err) = self
                                .context
                                .connectivity
                                .ban_peer_until(
                                    conn.peer_node_id().clone(),
                                    Duration::from_secs(60 * 60),
                                    err.to_string(),
                                )
                                .await
                            {
                                return err.into();
                            }
                        },

[stringhandler]

@delta1 ?