Update README.md (CodisLabs#1580)

Young Chen · spinlock · commit 7da27216e463 · 2018-11-04T16:21:46.000+08:00
## 空格问题
diff --git a/README.md b/README.md
@@ -58,10 +58,10 @@ Group
 Sentinel
 ![sentinel](doc/pictures/snapshots4.png)
 
-##Benchmarks
+## Benchmarks
 [See benchmark results](doc/benchmark.md)
 
-##Authors
+## Authors
 
 Active authors:
 * [@spinlock9](https://github.com/spinlock) [微博@斯宾洛克](http://weibo.com/spinlock9)
