Minor improve

leviding · web-flow · commit 50176d628a31 · 2020-04-10T15:18:52.000+08:00
diff --git a/5-network/05-fetch-crossorigin/1-do-we-need-origin/task.md b/5-network/05-fetch-crossorigin/1-do-we-need-origin/task.md
@@ -8,7 +8,7 @@ importance: 5
 
 例如，当从 `http://javascript.info/some/url` fetch `http://google.com` 时，header 看起来如下：
 
-```
+```http
 Accept: */*
 Accept-Charset: utf-8
 Accept-Encoding: gzip,deflate,sdch
