chore(deps-dev): update rector/rector requirement from 1.2.8 to 1.2.9

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

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

composer.json

@@ -31,7 +31,7 @@
     "codeigniter4/devkit": "^1.0",
     "codeigniter4/framework": "^4.3.5",
     "codeigniter4/shield": "^1.0",
-    "rector/rector": "1.2.8"
+    "rector/rector": "1.2.9"
   },
   "autoload": {
     "psr-4": {