pythongh-122399: change webbrowser.rst to better describe the contents of controller object

This is a minor change that addresses python#122399 (for the 3.12 branch).

It fixes the reference to the attribute `name` so it belongs to the controller object (and not to the webbrowser module).

It also mentions that the controller object has a name attribute too, before mentioning it with the other methods.

Author: jordibc

Doc/library/webbrowser.rst

@@ -190,11 +190,11 @@ Here are some simple examples::
 Browser Controller Objects
 --------------------------
 
-Browser controllers provide these methods which parallel three of the
-module-level convenience functions:
+Browser controllers provide the :attr:`name` attribute, and these three methods
+which parallel module-level convenience functions:
 
 
-.. attribute:: name
+.. attribute:: controller.name
 
    System-dependent name for the browser.