Update dependency phpstan/phpstan to ^2.1.26

| datasource | package         | from   | to     |
| ---------- | --------------- | ------ | ------ |
| packagist  | phpstan/phpstan | 2.1.25 | 2.1.26 |

Author: renovate[bot]

composer.json

@@ -8,7 +8,7 @@
     "require": {
         "php": "~8.2.0 || ~8.3.0 || ~8.4.0",
         "nikic/php-parser": "^5.6.1",
-        "phpstan/phpstan": "^2.1.25"
+        "phpstan/phpstan": "^2.1.26"
     },
     "require-dev": {
         "doctrine/coding-standard": "^13.0.1",