Add headings to space out the page

Author: mbabker

docs/configuring-the-bundle.md

@@ -4,12 +4,16 @@
 
 The default currency for your application can be set with the `default_currency` configuration node. This defaults to "USD" and can be any valid currency code accepted by the Money library.
 
+### YAML based configuration
+
 ```yaml
 # config/packages/babdev_money.yaml
 babdev_money:
     default_currency: EUR
 ```
 
+### PHP based configuration
+
 ```php
 <?php // config/packages/babdev_money.php