composer(deps-dev): bump the version-updates group with 2 updates

Updates the requirements on [phpstan/phpstan](https://github.com/phpstan/phpstan) and [rector/rector](https://github.com/rectorphp/rector) to permit the latest version.

Updates `phpstan/phpstan` to 1.12.8
- [Release notes](https://github.com/phpstan/phpstan/releases)
- [Changelog](https://github.com/phpstan/phpstan/blob/2.0.x/CHANGELOG.md)
- [Commits](phpstan/phpstan@1.12.7...1.12.8)

Updates `rector/rector` to 1.2.9
- [Release notes](https://github.com/rectorphp/rector/releases)
- [Commits](rectorphp/rector@1.2.8...1.2.9)

---
updated-dependencies:
- dependency-name: phpstan/phpstan
  dependency-type: direct:development
  dependency-group: version-updates
- dependency-name: rector/rector
  dependency-type: direct:development
  dependency-group: version-updates
...

Signed-off-by: dependabot[bot] <[email protected]>

composer.json

@@ -37,11 +37,11 @@
     "mimmi20/coding-standard": "^5.2.44",
     "nikic/php-parser": "^4.19.1 || ^5.0.2",
     "phpstan/extension-installer": "^1.4.3",
-    "phpstan/phpstan": "^1.12.7",
+    "phpstan/phpstan": "^1.12.8",
     "phpstan/phpstan-deprecation-rules": "^1.2.1",
     "phpstan/phpstan-phpunit": "^1.4.0",
     "phpunit/phpunit": "^10.5.27",
-    "rector/rector": "^1.2.8",
+    "rector/rector": "^1.2.9",
     "rector/type-perfect": "^1.0.0",
     "symplify/phpstan-rules": "^13.0.1",
     "tomasvotruba/cognitive-complexity": "^0.2.3",