Fixing example in README

bjesus · rubennorte · commit 68ec2abc4a74 · 2017-01-11T00:22:51.000+01:00
It's missing an `)`
diff --git a/README.md b/README.md
@@ -535,7 +535,7 @@ Alternatively, you can encode data using the [`qs`](https://github.com/ljharb/qs
 
 ```js
 var qs = require('qs');
-axios.post('/foo', qs.stringify({ 'bar': 123 });
+axios.post('/foo', qs.stringify({ 'bar': 123 }));
 ```
 
 ### Node.js
