minor #13509 [EventDispatcher] Fix position of AddEventAliasesPass (fsoedjede)

This PR was merged into the 4.4 branch.

Discussion
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[EventDispatcher] Fix position of `AddEventAliasesPass`

In the note following the change, it's written : Note that ``AddEventAliasesPass`` has to be processed before ``RegisterListenersPass``.
But in the code it was the inverse

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Commits
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577993a [EventDispatcher] Fix position of `AddEventAliasesPass`

Author: javiereguiluz

components/event_dispatcher.rst

@@ -235,10 +235,10 @@ determine which instance is passed.
         use Symfony\Component\EventDispatcher\EventDispatcher;
 
         $containerBuilder = new ContainerBuilder(new ParameterBag());
-        $containerBuilder->addCompilerPass(new RegisterListenersPass(), PassConfig::TYPE_BEFORE_REMOVING);
         $containerBuilder->addCompilerPass(new AddEventAliasesPass([
             \AcmeFooActionEvent::class => 'acme.foo.action',
         ]));
+        $containerBuilder->addCompilerPass(new RegisterListenersPass(), PassConfig::TYPE_BEFORE_REMOVING)
 
         $containerBuilder->register('event_dispatcher', EventDispatcher::class);