Prevent calling `UpdateMany` when tehre is no changes

modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Menus/PageChangedHandler.cs

@@ -1,3 +1,4 @@
+using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
 using Volo.Abp.DependencyInjection;
@@ -31,6 +32,11 @@ public class PageChangedHandler :
                                 .Where(x => x.PageId == eventData.Entity.Id)
                                 .ToArray();
 
+        if (affectedMenuItems.IsNullOrEmpty())
+        {
+            return;
+        }
+
         foreach (var menuItem in affectedMenuItems)
         {
             MenuManager.SetPageUrl(menuItem, eventData.Entity);