Change the way the dirtyHookCallback is called

It shouldn't be bound to the Query instance. Looks a bit stupid, but
when stored in a class property you can't call it like:
$this->closure();
because that's the syntax for calling class methods.

Author: otsch

src/Query.php

@@ -729,7 +729,11 @@ private function setDirty(): void
 
         $this->parent?->setDirty();
 
-        $this->dirtyHookCallback?->call($this);
+        if ($this->dirtyHookCallback) {
+            $dirtyHookCallback = $this->dirtyHookCallback;
+
+            $dirtyHookCallback();
+        }
     }
 
     /**