fix(account): 用户头像文件验证

aspnet-core/modules/account/LINGYUN.Abp.Account.Application.Contracts/LINGYUN/Abp/Account/Dto/ChangePictureInput.cs

@@ -1,10 +1,12 @@
-using Volo.Abp.Auditing;
+using System.ComponentModel.DataAnnotations;
+using Volo.Abp.Auditing;
 using Volo.Abp.Content;
 
 namespace LINGYUN.Abp.Account;
 
 public class ChangePictureInput
 {
+    [Required]
     [DisableAuditing]
     public IRemoteStreamContent File { get; set; }
 }