Added establishment saving

apps/establishment/tasks.py

@@ -88,6 +88,8 @@ def update_establishment_image_urls(part_number: int, summary_tasks: int, bucket
 
             elif establishment.preview_image_url is None:
                 establishment.preview_image_url = live_link
-
+        
+        establishment.save()
+        
     logger.info(f'The {part_number}th part of the image update '
                 f'from {summary_tasks} parts was completed')