ci: add tests for PHP 8.5

Author: Chris8934

composer.json

@@ -18,7 +18,7 @@
     },
     "require-dev": {
         "phpunit/phpunit": "^8.5 || ^9.0 || ^10.0 || ^11.0 || ^12.0",
-        "php-http/client-integration-tests": "^3.0 || 3.x-dev",
+        "php-http/client-integration-tests": "^3.0",
         "phpspec/prophecy-phpunit": "^2.0",
         "php-http/message-factory": "^1.1"
     },