更新代码注释

FworkSpider/feapder/core/handle_failed_items.py

@@ -55,7 +55,7 @@ class HandleFailedItems:
                 for message in failed_items:
                     delivery_tag = message.delivery_tag
                     data = message.body
-                    del data[self._redis_key]  # 添加item失败标识
+                    del data[self._redis_key]  # 删除item数据标识
                     for add in data.get("add"):
                         table = add.get("table")
                         datas = add.get("datas")