Update symfony/http-foundation requirement from ^6.0 to ^7.1

Updates the requirements on [symfony/http-foundation](https://github.com/symfony/http-foundation) to permit the latest version.
- [Release notes](https://github.com/symfony/http-foundation/releases)
- [Changelog](https://github.com/symfony/http-foundation/blob/7.1/CHANGELOG.md)
- [Commits](symfony/http-foundation@v6.0.0...v7.1.1)

---
updated-dependencies:
- dependency-name: symfony/http-foundation
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

composer.json

@@ -37,7 +37,7 @@
         "simplesamlphp/composer-module-installer": "^1.3.4",
         "simplesamlphp/simplesamlphp": "^2.1",
         "simplesamlphp/xml-common": "^1.12",
-        "symfony/http-foundation": "^6.0"
+        "symfony/http-foundation": "^7.1"
     },
     "require-dev": {
         "simplesamlphp/simplesamlphp-test-framework": "^1.5.5"