Update symplify/easy-coding-standard requirement from ^11.0 to ^12.1

Updates the requirements on [symplify/easy-coding-standard](https://github.com/easy-coding-standard/easy-coding-standard) to permit the latest version.
- [Release notes](https://github.com/easy-coding-standard/easy-coding-standard/releases)
- [Commits](easy-coding-standard/easy-coding-standard@11.0.1...12.1.14)

---
updated-dependencies:
- dependency-name: symplify/easy-coding-standard
  dependency-type: direct:development
...

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

composer.json

@@ -43,7 +43,7 @@
         "rector/rector": "^0.16",
         "symfony/framework-bundle": "^5.3|^6.0",
         "symfony/phpunit-bridge": "^5.3|^6.0",
-        "symplify/easy-coding-standard": "^11.0"
+        "symplify/easy-coding-standard": "^12.1"
     },
     "config": {
         "sort-packages": true,