Fix include node signature

CHANGELOG

@@ -1,5 +1,6 @@
 # 4.0.0 (2026-XX-XX)
 
+ * Add an optional `string $template = ''` argument to `IncludeNode::addGetTemplate()`; subclasses overriding this method must declare a compatible parameter
  * Remove `TemplateVariable` and `AssignTemplateVariable`; use `MacroVariable` and `AssignMacroVariable` instead
  * Add the `isAlwaysAllowedInSandbox()` method to `Twig\TwigCallableInterface` and `Twig\TokenParser\TokenParserInterface`
  * Always allow printing a `Markup` object in a sandbox, whatever the security policy is

phpstan-baseline.neon

@@ -1,11 +1,5 @@
 parameters:
 	ignoreErrors:
-		- # 2 parameters will be required
-			message: '#^Method Twig\\Node\\IncludeNode\:\:addGetTemplate\(\) invoked with 2 parameters, 1 required\.$#'
-			identifier: arguments.count
-			count: 1
-			path: src/Node/IncludeNode.php
-
 		- # Adding 0 to the string representation of a number is valid and what we want here
 			message: '#^Binary operation "\+" between 0 and string results in an error\.$#'
 			identifier: binaryOp.invalid

src/Node/IncludeNode.php

@@ -79,7 +79,7 @@ public function compile(Compiler $compiler): void
         }
     }
 
-    protected function addGetTemplate(Compiler $compiler/* , string $template = '' */): void
+    protected function addGetTemplate(Compiler $compiler, string $template = ''): void
     {
         $compiler
             ->raw('$this->load(')