Added correct documentation for proxy setting sferik#744 (sferik#854)

Author: alvinsight

examples/Configuration.md

@@ -131,12 +131,11 @@ If you'd like to connect via a proxy, a proxy can be configured by passing a
 `Hash` to your configuration:
 
 ```ruby
-proxy = {
-  host: '127.0.0.1',
-  port: 3328,
-  username: 'proxy_username',
-  password: 'proxy_password',
-}
+  proxy: {
+    uri: Addressable::URI.parse("http://proxy_host:proxy_port"),
+    username: "proxy_username",
+    password: "proxy_password"
+  }
 
 client = Twitter::REST::Client.new do |config|
   config.consumer_key        = "YOUR_CONSUMER_KEY"