Bump phpstan/phpstan from 2.1.38 to 2.1.40 in /tools/phpstan (#525)

Author: github-actions[bot]

tools/phpstan/composer.json

@@ -2,7 +2,7 @@
     "name": "coduo/php-matcher-tools",
     "description": "Coduo PHP Matcher - Tools",
     "require-dev": {
-        "phpstan/phpstan": "2.1.38"
+        "phpstan/phpstan": "2.1.40"
     },
     "config": {
         "allow-plugins": false,