website: typo on core config

website/source/docs/other/core-configuration.html.markdown

@@ -5,7 +5,7 @@ layout: "docs"
 # Core Configuration
 
 There are a few configuration settings that affect Packer globally by
-configuring the core of Packer. These settings all reasonable defaults, so
+configuring the core of Packer. These settings all have reasonable defaults, so
 you generally don't have to worry about it until you want to tweak
 a configuration. If you're just getting started with Packer, don't worry
 about core configuration for now.