Update dependency orchestra/testbench to v9

Author: renovate[bot]

composer.json

@@ -30,7 +30,7 @@
         "friendsofphp/php-cs-fixer": "^3.0",
         "guzzlehttp/guzzle": "^6.3|^7.0",
         "mockery/mockery": "^1.3",
-        "orchestra/testbench": "^5.0|^6.0|^7.0|^8.0",
+        "orchestra/testbench": "9.5.2",
         "phpunit/phpunit": "^9.1|^10.0|^11.0"
     },
     "autoload": {