[TASK] Update brotkrueml/schema to v4

| datasource | package           | from   | to    |
| ---------- | ----------------- | ------ | ----- |
| packagist  | brotkrueml/schema | 3.15.0 | 4.2.1 |

Author: renovate[bot]

composer.json

@@ -31,7 +31,7 @@
 	},
 	"require-dev": {
 		"armin/editorconfig-cli": "^2.0",
-		"brotkrueml/schema": "^3.0",
+		"brotkrueml/schema": "^3.0 || ^4.0",
 		"eliashaeussler/version-bumper": "^3.3",
 		"ergebnis/composer-normalize": "^2.29",
 		"friendsofphp/php-cs-fixer": "^3.57",