Bump symfony/yaml from 6.4.8 to 7.1.1

Bumps [symfony/yaml](https://github.com/symfony/yaml) from 6.4.8 to 7.1.1.
- [Release notes](https://github.com/symfony/yaml/releases)
- [Changelog](https://github.com/symfony/yaml/blob/7.1/CHANGELOG.md)
- [Commits](symfony/yaml@v6.4.8...v7.1.1)

---
updated-dependencies:
- dependency-name: symfony/yaml
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -23,7 +23,7 @@
         "symfony/polyfill-php81": "^1.29",
         "symfony/polyfill-php82": "^1.29",
         "symfony/polyfill-php83": "^1.29",
-        "symfony/yaml": "^6.0",
+        "symfony/yaml": "^7.1",
         "twig/twig": "^3.5"
     },
     "replace": {