tests: fix deprecation from PHPUnit

Author: Chris8934

composer.json

@@ -41,7 +41,7 @@
         "phpstan/extension-installer": "^1.3",
         "phpstan/phpstan": "^1.10",
         "phpstan/phpstan-phpunit": "^1.3",
-        "phpunit/phpunit": "^9.6",
+        "phpunit/phpunit": "^9.6.17",
         "symfony/http-client": "^5.4 || ^6.4 || ^7.0",
         "symfony/stopwatch": "^5.4 || ^6.4 || ^7.0"
     },