Minor reword

Author: javiereguiluz

service_container/lazy_services.rst

@@ -27,7 +27,8 @@ until you interact with the proxy in some way.
 
     Lazy services do not support `final`_ classes.
 
-    Lazy services do not support default parameters for php internals, like ``PDO`` in releases prior to PHP 8.0.
+    In PHP versions prior to 8.0 lazy services do not support parameters with
+    default values for built-in PHP classes (e.g. ``PDO``).
 
 Installation
 ------------