fix(deps)(deps-dev): bump phpstan/phpstan (#2)

---
updated-dependencies:
- dependency-name: phpstan/phpstan
  dependency-version: 2.1.40
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: composer-dev-minor-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

composer.json

@@ -37,7 +37,7 @@
 		"dealerdirect/phpcodesniffer-composer-installer": "^1.0",
 		"php-stubs/wp-cli-stubs": "^2.12",
 		"phpstan/extension-installer": "^1.3",
-		"phpstan/phpstan": "^2.1.22",
+		"phpstan/phpstan": "^2.1.40",
 		"phpstan/phpstan-deprecation-rules": "^2.0.3",
 		"phpstan/phpstan-phpunit": "^2.0.3",
 		"rtcamp/coding-standards-d": "^0.1.0",