[TASK] Update ssch/typo3-rector requirement from ^2.6.3 to ^2.6.4 (#1367)

Updates the requirements on [ssch/typo3-rector](https://github.com/sabbelasichon/typo3-rector) to permit the latest version.
- [Release notes](https://github.com/sabbelasichon/typo3-rector/releases)
- [Commits](https://github.com/sabbelasichon/typo3-rector/compare/v2.6.3...v2.6.4)

---
updated-dependencies:
- dependency-name: ssch/typo3-rector
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

composer.json

@@ -60,7 +60,7 @@
 		"seld/jsonlint": "^1.11.0",
 		"spaze/phpstan-disallowed-calls": "^3.4",
 		"squizlabs/php_codesniffer": "^3.10.1",
-		"ssch/typo3-rector": "^2.6.3",
+		"ssch/typo3-rector": "^2.6.4",
 		"ssch/typo3-rector-testing-framework": "^2.0.1",
 		"symfony/console": "^5.4 || ^6.4 || ^7.0",
 		"symfony/translation": "^5.4 || ^6.4 || ^7.0",