fix revise news 2024-03-11

unify_api/modules/qkadmin/service/news_mgr_srv.py

@@ -35,7 +35,8 @@ async def upload_news_qs(request):
     """附件上传"""
     url_article, url_cover = "", ""
     news_file = request.files.getlist("file1")[0]
-    cover_file = request.files.getlist("file2")[0]
+    file2_lst = request.files.getlist("file2")
+    cover_file = file2_lst[0] if file2_lst else None
     if not news_file:
         return False, url_article, url_cover