composer(deps-dev): bump ergebnis/phpstan-rules from 2.3.0 to 2.4.0

Bumps [ergebnis/phpstan-rules](https://github.com/ergebnis/phpstan-rules) from 2.3.0 to 2.4.0.
- [Release notes](https://github.com/ergebnis/phpstan-rules/releases)
- [Changelog](https://github.com/ergebnis/phpstan-rules/blob/main/CHANGELOG.md)
- [Commits](ergebnis/phpstan-rules@2.3.0...2.4.0)

---
updated-dependencies:
- dependency-name: ergebnis/phpstan-rules
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

composer.json

@@ -38,7 +38,7 @@
     "ergebnis/composer-normalize": "^2.44.0",
     "ergebnis/license": "^2.6.0",
     "ergebnis/php-cs-fixer-config": "^6.37.0",
-    "ergebnis/phpstan-rules": "^2.3.0",
+    "ergebnis/phpstan-rules": "^2.4.0",
     "ergebnis/phpunit-slow-test-detector": "^2.16.1",
     "infection/infection": "~0.27.11",
     "phpstan/extension-installer": "^1.4.3",