chore(deps): update dependency phpunit/phpunit to v12

Author: renovate[bot]

composer.json

@@ -27,7 +27,7 @@
     ],
     "require-dev": {
         "orchestra/testbench": "^9.0",
-        "phpunit/phpunit": "^11.0",
+        "phpunit/phpunit": "^12.0",
         "laravel/nova-devtool": "^1.6"
     },
     "require": {