fix: obsolete excel package

Endpoint/Controllers/V1/ImportController.cs

@@ -52,7 +52,7 @@ public class ImportController(IMediator mediator, IOptionsSnapshot<GeneralConfig
             LessonTypeIds = request.LessonType
         })).Schedules.ToList();
 
-        ExcelPackage.LicenseContext = LicenseContext.NonCommercial;
+        ExcelPackage.License.SetNonCommercialOrganization("Winsomnia");
         using var package = new ExcelPackage();
         var worksheet = package.Workbook.Worksheets.Add("Расписание");