chore(deps-dev): update rector/rector requirement from 1.2.0 to 1.2.1

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@1.2.0...1.2.1)

---
updated-dependencies:
- dependency-name: rector/rector
  dependency-type: direct:development
...

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

composer.json

@@ -39,7 +39,7 @@
         "phpstan/extension-installer": "^1.3",
         "phpstan/phpstan-strict-rules": "^1.5",
         "phpunit/phpunit": "^9.6",
-        "rector/rector": "1.2.0"
+        "rector/rector": "1.2.1"
     },
     "provide": {
         "codeigniter4/authentication-implementation": "1.0"