build(deps-dev): update rector/rector requirement from 1.2.5 to 1.2.6

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@1.2.5...1.2.6)

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

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

composer.json

@@ -30,7 +30,7 @@
     "require-dev": {
         "friendsofphp/php-cs-fixer": "3.64.0",
         "phpunit/phpunit": "10.5.27",
-        "rector/rector": "1.2.5",
+        "rector/rector": "1.2.6",
         "symplify/rule-doc-generator": "12.2.5"
     },
     "scripts": {