[DOCS] Complete the examples of AfterSectionMarkupGeneratedEvent

Releases: master
Resolves: #90990
Related: #88921
Change-Id: I9a3997bde020b500a1bd1a6712ae0e405001a452
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/64110


Tested-by: Daniel Siepmann <coding@daniel-siepmann.de>
Reviewed-by: Daniel Siepmann <coding@daniel-siepmann.de>

typo3/sysext/core/Documentation/Changelog/10.3/Feature-88921-NewEventInThePageLayoutViewClassToEnrichContentIntoTheColumnsInTheBackendLayout.rst

@@ -27,12 +27,13 @@ Example how to register the event listener in your own extension:
 
 .. code-block:: yaml
 
-  Vendor\MyExtension\Backend\View\PageLayoutViewDrawEmptyColposContent:
-    tags:
-      - name: event.listener
-        identifier: 'myColposListener'
-        before: 'backend-empty-colpos'
-        event:  TYPO3\CMS\Backend\View\Event\AfterSectionMarkupGeneratedEvent
+  services:
+    Vendor\MyExtension\Backend\View\PageLayoutViewDrawEmptyColposContent:
+      tags:
+        - name: event.listener
+          identifier: 'myColposListener'
+          before: 'backend-empty-colpos'
+          event:  TYPO3\CMS\Backend\View\Event\AfterSectionMarkupGeneratedEvent
 
 With :yaml:`before` and :yaml:`after`, you can make sure your own listener is
 executed before or after the given identifiers.
@@ -41,6 +42,9 @@ executed before or after the given identifiers.
 
 .. code-block:: php
 
+   <?php
+   namespace Vendor\MyExtension\Backend\View;
+
    class PageLayoutViewDrawEmptyColposContent
    {
       public function __invoke(AfterSectionMarkupGeneratedEvent $event): void