minor #1824 [Stimulus] Use Twig >3.9 'EscaperRuntime' (smnandre)

This PR was merged into the 2.x branch.

Discussion
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[Stimulus] Use Twig >3.9 'EscaperRuntime'

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| Issues        | Fix #...
| License       | MIT

Resolves CI deprecations (for > Twig 3.9)

Twig introduction of EscaperRuntime here: twigphp/Twig#4055

Commits
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1fe2ae3 [Stimulus] Use Twig >3.9 'EscaperRuntime'

Author: kbond

src/StimulusBundle/src/Dto/StimulusAttributes.php

@@ -15,6 +15,7 @@
 
 use Twig\Environment;
 use Twig\Extension\EscaperExtension;
+use Twig\Runtime\EscaperRuntime;
 
 /**
  * Helper to build Stimulus-related HTML attributes.
@@ -215,6 +216,10 @@ private function getFormattedValue(mixed $value): string
 
     private function escapeAsHtmlAttr(mixed $value): string
     {
+        if (class_exists(EscaperRuntime::class)) {
+            return $this->env->getRuntime(EscaperRuntime::class)->escape($value, 'html_attr');
+        }
+
         if (method_exists(EscaperExtension::class, 'escape')) {
             return EscaperExtension::escape($this->env, $value, 'html_attr');
         }