Update symfony/process requirement from ^5.4 to ^7.1

Updates the requirements on [symfony/process](https://github.com/symfony/process) to permit the latest version.
- [Release notes](https://github.com/symfony/process/releases)
- [Changelog](https://github.com/symfony/process/blob/7.1/CHANGELOG.md)
- [Commits](symfony/process@v5.4.0...v7.1.6)

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

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

composer.json

@@ -6,7 +6,7 @@
     "require": {
         "php": ">=8.1",
         "cakephp/cakephp": "^5.0.0",
-        "symfony/process": "^5.4"
+        "symfony/process": "^7.1"
     },
     "require-dev": {
         "phpunit/phpunit": "^10.1",