README.md in itamae-mitsurin-0.7 vs README.md in itamae-mitsurin-0.8

@@ -21,13 +21,12 @@
 ## Usage AWS Resource
 
 ```ruby
 # recipe
 
-Aws.config[:region] = 'ap-northeast-1'
-
 aws_ebs_volume "ebs_name" do
   action [:create, :attach]
+  region "ap-northeast-1"
   availability_zone "ap-northeast-1a"
   device '/dev/xvdb'
   volume_type 'standard'
   size 10
   instance_id 'i-xxxxxxx'