Update README.md

Author: doannc2212

README.md

@@ -50,9 +50,9 @@ POST baseUrl/clear
 Cookie: userId=john
 ```
 
-3. Retrieve mock data <br>
+3. Retrieve mock data <br/>
 Send request to `baseUrl/api/` + `path` which you create before
-<br>
+
 *Request*:
 ```js
 GET baseUrl/api/sample