build(deps): bump symfony/twig-bundle from 7.0.8 to 7.1.1 in /backend

Bumps [symfony/twig-bundle](https://github.com/symfony/twig-bundle) from 7.0.8 to 7.1.1.
- [Release notes](https://github.com/symfony/twig-bundle/releases)
- [Changelog](https://github.com/symfony/twig-bundle/blob/7.1/CHANGELOG.md)
- [Commits](symfony/twig-bundle@v7.0.8...v7.1.1)

---
updated-dependencies:
- dependency-name: symfony/twig-bundle
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

backend/composer.json

@@ -43,7 +43,7 @@
         "symfony/stimulus-bundle": "^2.16",
         "symfony/string": "7.1.*",
         "symfony/translation": "7.0.*",
-        "symfony/twig-bundle": "7.0.*",
+        "symfony/twig-bundle": "7.1.*",
         "symfony/ux-turbo": "^2.16",
         "symfony/validator": "7.0.*",
         "symfony/web-link": "7.0.*",