Update dependency twig/string-extra to ^3.15.0

Author: renovate[bot]

composer.json

@@ -30,7 +30,7 @@
         "symfony/yaml": "^7.1.6",
         "symfonycasts/tailwind-bundle": "^0.6.1",
         "twig/extra-bundle": "^3.15.0",
-        "twig/string-extra": "^3.13.0",
+        "twig/string-extra": "^3.15.0",
         "twig/twig": "^3.15.0"
     },
     "config": {