f update pending channel config

Author: dunxen

lightning/src/ln/channelmanager.rs

@@ -3576,6 +3576,9 @@ where
 			};
 			let mut config = context.config();
 			config.apply(config_update);
+			// We update the config, but we MUST NOT broadcast a `channel_update` before `channel_ready`
+			// which would be the case for pending inbound/outbound channels.
+			context.update_config(&config);
 		}
 		Ok(())
 	}