update comments

Sunny Jiao · Sunny Jiao · commit 41c3ba01e93e · 2025-08-20T10:29:11.000+08:00
diff --git a/common/src/main/java/org/tron/core/exception/MaintenanceUnavailableException.java b/common/src/main/java/org/tron/core/exception/MaintenanceUnavailableException.java
@@ -1,7 +1,7 @@
 package org.tron.core.exception;
 
 /**
- * Maintenance clearing exception - thrown when system is in maintenance clearing state
+ * Maintenance unavailable exception - thrown when service is in maintenance state
  * Please try again later
  */
 public class MaintenanceUnavailableException extends TronException {
