Update stubs

Author: phpstan-bot

stubs/ext/reflection/ReflectionProperty.php

@@ -264,6 +264,9 @@ public function isFinal(): bool
     /** @cvalue ZEND_ACC_PRIVATE_SET */
     #[\Since('8.4')]
     public const int IS_PRIVATE_SET = UNKNOWN;
+    /** @cvalue ZEND_ACC_VIRTUAL */
+    #[\Since('8.4')]
+    public const int IS_VIRTUAL = UNKNOWN;
     /** @cvalue ZEND_ACC_FINAL */
     #[\Since('8.4')]
     public const int IS_FINAL = UNKNOWN;