chore: update minimal dev dependencies

Author: GwendolenLynch

composer.json

@@ -94,6 +94,7 @@
         "symfony/security-bundle": "^6.4 || ^7.0",
         "symfony/security-core": "^6.4 || ^7.0",
         "symfony/stopwatch": "^6.4 || ^7.0",
+        "symfony/string": "^6.4 || ^7.0",
         "symfony/twig-bundle": "^6.4 || ^7.0",
         "symfony/uid": "^6.4 || ^7.0",
         "symfony/validator": "^6.4 || ^7.0",