fix PHP 8.5 deprecations - fix SplObjectStorage

Method SplObjectStorage::contains() is deprecated since 8.5, use method SplObjectStorage::offsetExists() instead
Method SplObjectStorage::detach() is deprecated since 8.5, use method SplObjectStorage::offsetUnset() instead

Author: aaa2000

src/Symfony/Doctrine/EventListener/PublishMercureUpdatesListener.php

@@ -129,25 +129,25 @@ public function postFlush(): void
         try {
             $creatingObjects = clone $this->createdObjects;
             foreach ($creatingObjects as $object) {
-                if ($this->createdObjects->contains($object)) {
-                    $this->createdObjects->detach($object);
+                if ($this->createdObjects->offsetExists($object)) {
+                    $this->createdObjects->offsetUnset($object);
                 }
                 $this->publishUpdate($object, $creatingObjects[$object], 'create');
             }
 
             $updatingObjects = clone $this->updatedObjects;
             foreach ($updatingObjects as $object) {
-                if ($this->updatedObjects->contains($object)) {
-                    $this->updatedObjects->detach($object);
+                if ($this->updatedObjects->offsetExists($object)) {
+                    $this->updatedObjects->offsetUnset($object);
                 }
                 $this->publishUpdate($object, $updatingObjects[$object], 'update');
             }
 
             $deletingObjects = clone $this->deletedObjects;
             foreach ($deletingObjects as $object) {
                 $options = $this->deletedObjects[$object];
-                if ($this->deletedObjects->contains($object)) {
-                    $this->deletedObjects->detach($object);
+                if ($this->deletedObjects->offsetExists($object)) {
+                    $this->deletedObjects->offsetUnset($object);
                 }
                 $this->publishUpdate($object, $deletingObjects[$object], 'delete');
             }