Update symfony/serializer requirement from ^5.4|^6.0 to ^6.1.3

Updates the requirements on [symfony/serializer](https://github.com/symfony/serializer) to permit the latest version.
- [Release notes](https://github.com/symfony/serializer/releases)
- [Changelog](https://github.com/symfony/serializer/blob/6.1/CHANGELOG.md)
- [Commits](https://github.com/symfony/serializer/commits/v6.1.3)

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

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

Author: dependabot[bot]

composer.json

@@ -96,7 +96,7 @@
         "symfony/framework-bundle": "^5.4|^6.0",
         "symfony/http-client": "^5.4|^6.0",
         "symfony/phpunit-bridge": "^6.1.3",
-        "symfony/serializer": "^5.4|^6.0",
+        "symfony/serializer": "^6.1.3",
         "symfony/var-dumper": "^5.4|^6.0",
         "symfony/yaml": "^6.1.3",
         "symplify/easy-coding-standard": "^11.0"