fix periodic task runner

bots/models.py

@@ -38,6 +38,7 @@ class TelegramBot(models.Model):
             return
         self.config.periodic_task(self.get_bot())
         self.periodic_last_run = timezone.now()
+        self.save()
 
     def __str__(self):
         return f'#{self.pk} {self.title}'