Add a property "IsFavorite" for the drop zone.

Back/skydiveLogs-api.Business/DropZoneService.cs

@@ -35,9 +35,10 @@ namespace skydiveLogs_api.Business
             return _dropZoneRepository.GetById(id);
         }
 
-        public void UpdateDz(int id, DropZone dropZone)
+        public bool UpdateDz(int id, DropZone dropZone)
         {
-            throw new NotImplementedException();
+            dropZone.Id = id;
+            return _dropZoneRepository.Update(dropZone);
         }
 
         private readonly IDropZoneRepository _dropZoneRepository;