Update symplify/easy-coding-standard requirement from ^10.0 to ^12.3

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@10.0.0...12.3.1)

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

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

composer.json

@@ -27,7 +27,7 @@
 		"nette/di": "^3.0"
 	},
 	"require-dev": {
-		"symplify/easy-coding-standard": "^10.0",
+		"symplify/easy-coding-standard": "^12.3",
 		"phpstan/phpstan": "^0.12.18",
 		"phpstan/phpstan-nette": "^0.12.6"
 	},