Update symfony/psr-http-message-bridge requirement from ^2.1 to ^7.1

Updates the requirements on [symfony/psr-http-message-bridge](https://github.com/symfony/psr-http-message-bridge) to permit the latest version.
- [Release notes](https://github.com/symfony/psr-http-message-bridge/releases)
- [Changelog](https://github.com/symfony/psr-http-message-bridge/blob/7.1/CHANGELOG.md)
- [Commits](symfony/psr-http-message-bridge@v2.1.0...v7.1.1)

---
updated-dependencies:
- dependency-name: symfony/psr-http-message-bridge
  dependency-type: direct:development
...

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

composer.json

@@ -50,7 +50,7 @@
         "nyholm/psr7-server": "^1.0",
         "phpunit/phpunit": ">=8.0",
         "symfony/cache": "^5.0 || ^6.0",
-        "symfony/psr-http-message-bridge": "^2.1"
+        "symfony/psr-http-message-bridge": "^7.1"
     },
     "suggest": {
         "radebatz/openapi-verifier": "Allows your PHPUnit tests to validate your controller response against the OpenAPI annotations."