update note

Author: dburles

packages/components/README.md

@@ -3,7 +3,7 @@
 
 Primitive layout, typographic, and other components for use with Theme UI.
 
-**Note:** This package is already included with the main `theme-ui` package, therefore a separate installation is not required.
+**Note:** *This package is included in the main `theme-ui` package and a separate installation is not required.*
 
 ```sh
 npm i @theme-ui/components