Update twig/twig requirement from ^3.11 to ^3.15

Updates the requirements on [twig/twig](https://github.com/twigphp/Twig) to permit the latest version.
- [Changelog](https://github.com/twigphp/Twig/blob/3.x/CHANGELOG)
- [Commits](twigphp/Twig@v3.11.0...v3.15.0)

---
updated-dependencies:
- dependency-name: twig/twig
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

composer.json

@@ -27,7 +27,7 @@
     "php": "^8.2",
     "ext-json": "*",
     "symfony/console": "^7.1",
-    "twig/twig": "^3.11"
+    "twig/twig": "^3.15"
   },
   "require-dev": {
     "grifart/phpstan-oneline": "~0.4",