Tools - ecs (deps-dev): Update symplify/easy-coding-standard requirement

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...12.1.12)

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

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

tools/ecs/composer.json

@@ -1,5 +1,5 @@
 {
     "require-dev": {
-        "symplify/easy-coding-standard": "^11"
+        "symplify/easy-coding-standard": "^12"
     }
 }