update doc

Author: lylandroid

README.md

@@ -103,7 +103,6 @@ request.putParams(key,value)
 .putParams(key,value)
 .putParams(key,value);
 
-
 Map<String,Object> map = new HashMap<>();
 map.put(key,value);
 request.putParamsMap(map);
@@ -179,5 +178,4 @@ ItheimaHttp.setDebug(true);
 
 ![](http://upload-images.jianshu.io/upload_images/4037105-8f737b5104dd0b5d.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
 
-
-[回到顶部](#readme)
+[回到顶部](#readme)