minor #9883 Change code file location (ismail1432, javiereguiluz)

This PR was merged into the 2.8 branch.

Discussion
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Change code file location

I don't know if it's a "mistake", but common practices is to define services in `app/config/services.yml`

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Commits
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9960f0c Fixed some wrong file paths
8e2ff4a Change code file location

Author: javiereguiluz

console/commands_as_services.rst

@@ -25,7 +25,7 @@ with ``console.command``:
 
     .. code-block:: yaml
 
-        # app/config/config.yml
+        # app/config/services.yml
         services:
             app.command.my_command:
                 class: AppBundle\Command\MyCommand
@@ -34,7 +34,7 @@ with ``console.command``:
 
     .. code-block:: xml
 
-        <!-- app/config/config.xml -->
+        <!-- app/config/services.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <container xmlns="http://symfony.com/schema/dic/services"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
@@ -52,7 +52,7 @@ with ``console.command``:
 
     .. code-block:: php
 
-        // app/config/config.php
+        // app/config/services.php
         use AppBundle\Command\MyCommand;
 
         $container