chore(deps): bump phpunit/phpunit from 9.6.29 to v12

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

composer.json

@@ -20,7 +20,7 @@
 	},
 	"require-dev": {
 		"christophwurst/nextcloud_testing": "^1.0.1",
-		"phpunit/phpunit": "^9.6.29",
+		"phpunit/phpunit": "^12.4.2",
 		"roave/security-advisories": "dev-master"
 	},
 	"scripts": {