fix：oom

Author: Zxc4wonder

backend/web/src/main/java/org/jumpserver/chen/web/config/WebSocketConfig.java

@@ -25,8 +25,8 @@ public class WebSocketConfig implements WebSocketConfigurer {
     @Bean
     public ServletServerContainerFactoryBean createWebSocketContainer() {
         ServletServerContainerFactoryBean container = new ServletServerContainerFactoryBean();
-        container.setMaxTextMessageBufferSize(20 * 1024 * 1024);
-        container.setMaxBinaryMessageBufferSize(20 * 1024 * 1024);
+        container.setMaxTextMessageBufferSize(1024 * 1024);
+        // 不设置 binary，使用 Tomcat 默认 8 * 1024
         // 可选：异步发送超时
         // container.setAsyncSendTimeout(20_000L);
         return container;