Bump phpstan/phpstan from 2.1.30 to 2.1.31

---
updated-dependencies:
- dependency-name: phpstan/phpstan
  dependency-version: 2.1.31
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

composer.json

@@ -11,7 +11,7 @@
     },
     "require-dev": {
         "pestphp/pest": "4.1.2",
-        "phpstan/phpstan": "2.1.30"
+        "phpstan/phpstan": "2.1.31"
     },
     "license": "MIT",
     "autoload": {