更新 '_posts/limit-request.md'

_posts/limit-request.md

@@ -2,6 +2,7 @@
 title: 人人都能看懂的 6 种限流实现方案！
 date: 2020-05-18
 tags: Java
+cover: https://static.jqwei.com/blog/img/IMG_3460.PNG
 comments: false
 categories: 编程语言
 ---