chore(deps-dev): bump ergebnis/phpstan-rules from 2.0.0 to 2.1.0

Bumps [ergebnis/phpstan-rules](https://github.com/ergebnis/phpstan-rules) from 2.0.0 to 2.1.0.
- [Release notes](https://github.com/ergebnis/phpstan-rules/releases)
- [Changelog](https://github.com/ergebnis/phpstan-rules/blob/main/CHANGELOG.md)
- [Commits](https://github.com/ergebnis/phpstan-rules/compare/2.0.0...2.1.0)

---
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

@@ -111,7 +111,7 @@
   },
   "require-dev": {
     "barryvdh/laravel-ide-helper": "2.*",
-    "ergebnis/phpstan-rules": "^2.0",
+    "ergebnis/phpstan-rules": "^2.1",
     "fakerphp/faker": "1.*",
     "filp/whoops": "2.*",
     "mockery/mockery": "1.*",