Corrected dead link (#164)

Author: ptcrash

README.md

@@ -108,8 +108,8 @@ the SDK's User Guide.
 
 ## Usage
 
-In order to use the AWS SDK for PHP within your app, you need to retrieve it from the [Laravel IoC
-Container](http://laravel.com/docs/ioc). The following example uses the Amazon S3 client to upload a file.
+In order to use the AWS SDK for PHP within your app, you need to retrieve it from the [Laravel Service
+Container](https://laravel.com/docs/container#binding). The following example uses the Amazon S3 client to upload a file.
 
 ```php
 $s3 = App::make('aws')->createClient('s3');