Updates Composer Installation Instructions

Signed-off-by: Justin Yost <justin.yost@yostivanich.com>

Author: justinyost

README.md

@@ -19,7 +19,9 @@ A CakePHP plugin that provides a Shell to read an app's Configure vars from the
 
 ## Installation
 
-`composer require loadsys/config-read:2.*`
+```bash
+$ composer require loadsys/config-read:2.*
+```
 
 or