fix: simplify constructor by using property promotion

Author: Morgy93

src/Model/TemplateEngine/Decorator/InspectorHintsFactory.php

@@ -11,14 +11,9 @@
  */
 class InspectorHintsFactory
 {
-    private ObjectManagerInterface $objectManager;
-
-    /**
-     * @param ObjectManagerInterface $objectManager
-     */
-    public function __construct(ObjectManagerInterface $objectManager)
-    {
-        $this->objectManager = $objectManager;
+    public function __construct(
+        private readonly ObjectManagerInterface $objectManager
+    ) {
     }
 
     /**