Update symfony/http-client requirement from ^6.1 to ^7.1

Updates the requirements on [symfony/http-client](https://github.com/symfony/http-client) to permit the latest version.
- [Release notes](https://github.com/symfony/http-client/releases)
- [Changelog](https://github.com/symfony/http-client/blob/7.1/CHANGELOG.md)
- [Commits](symfony/http-client@v6.1.0...v7.1.6)

---
updated-dependencies:
- dependency-name: symfony/http-client
  dependency-type: direct:development
...

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

composer.json

@@ -34,7 +34,7 @@
     "require-dev": {
         "nyholm/psr7": "^1.5",
         "php-http/mock-client": "^1.5",
-        "symfony/http-client": "^6.1",
+        "symfony/http-client": "^7.1",
         "phpunit/phpunit": "^11.4",
         "cweagans/composer-patches": "^1.7"
     },