冷启动发布，增加品类信息bugfix

cold_start/publish/publishCategoryArticles.py

@@ -344,7 +344,7 @@ class CategoryColdStartTask(object):
 
         # split into different category
         for ai_category in self.article_category_list:
-            filter_category_df = filtered_articles_df[filtered_articles_df['ai_category'] == ai_category]
+            filter_category_df = filtered_articles_df[filtered_articles_df['category_by_ai'] == ai_category]
             url_list = filter_category_df['link'].values.tolist()
             if url_list:
                 # create_crawler_plan