Fix article content type.

GitOrigin-RevId: 0469eb98f3603ea6f7f220d92374572d6b029e87

td/telegram/InlineQueriesManager.cpp

@@ -530,6 +530,7 @@ void InlineQueriesManager::answer_inline_query(int64 inline_query_id, bool is_pe
         type = "article";
         id = std::move(article->id_);
         content_url = std::move(article->url_);
+        content_type = "text/html";
         if (!article->hide_url_) {
           url = content_url;
         }