Update symfony/yaml requirement from ^6.0 to ^7.1

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

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

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

composer.json

@@ -41,7 +41,7 @@
         "symfony/finder": "^6.0",
         "symfony/polyfill-php73": "^1.22",
         "symfony/process": "^6.0",
-        "symfony/yaml": "^6.0",
+        "symfony/yaml": "^7.1",
         "symplify/git-wrapper": "^10.2.0",
         "yiisoft/files": "^2.0",
         "yiisoft/var-dumper": "^1.4"