Fix compat with PHP 8.4

CHANGELOG

@@ -1,5 +1,6 @@
 # 3.9.0 (2024-XX-XX)
 
+ * Add support for PHP 8.4
  * Deprecate AbstractNodeVisitor
  * Deprecate passing Template to Environment::resolveTemplate(), Environment::load(), and Template::loadTemplate()
  * Add a new "yield" mode for output generation;

src/Node/Expression/CallExpression.php

@@ -297,7 +297,7 @@ abstract class CallExpression extends AbstractExpression
         }
         $r = new \ReflectionFunction($closure);
 
-        if (str_contains($r->name, '{closure}')) {
+        if (str_contains($r->name, '{closure')) {
             return $this->reflector = [$r, $callable, 'Closure'];
         }