composer(deps-dev): Bump rector/rector from 1.2.8 to 1.2.9

Bumps [rector/rector](https://github.com/rectorphp/rector) from 1.2.8 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: rector/rector
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

composer.json

@@ -31,7 +31,7 @@
     "infection/infection": "~0.26.6",
     "phpunit/phpunit": "^6.5.14 || ^7.5.20 || ^8.5.19 || ^9.6.16",
     "psalm/plugin-phpunit": "~0.19.0",
-    "rector/rector": "^1.2.8",
+    "rector/rector": "^1.2.9",
     "vimeo/psalm": "^5.26.1"
   },
   "provide": {