fix url to defaults.js (#4532)

fix url to defaults.js

Co-authored-by: Jay <jasonsaayman@gmail.com>

README.md

@@ -582,7 +582,7 @@ instance.defaults.headers.common['Authorization'] = AUTH_TOKEN;
 
 ### Config order of precedence
 
-Config will be merged with an order of precedence. The order is library defaults found in [lib/defaults.js](https://github.com/axios/axios/blob/master/lib/defaults.js#L28), then `defaults` property of the instance, and finally `config` argument for the request. The latter will take precedence over the former. Here's an example.
+Config will be merged with an order of precedence. The order is library defaults found in [lib/defaults.js](https://github.com/axios/axios/blob/master/lib/defaults/index.js#L28), then `defaults` property of the instance, and finally `config` argument for the request. The latter will take precedence over the former. Here's an example.
 
 ```js
 // Create an instance using the config defaults provided by the library