Update orchestra/testbench requirement from ^8.22.0 to ^8.22.0 || ^9.0.0

Updates the requirements on [orchestra/testbench](https://github.com/orchestral/testbench) to permit the latest version.
- [Release notes](https://github.com/orchestral/testbench/releases)
- [Changelog](https://github.com/orchestral/testbench/blob/9.x/CHANGELOG-9.x.md)
- [Commits](orchestral/testbench@v8.22.0...v9.0.1)

---
updated-dependencies:
- dependency-name: orchestra/testbench
  dependency-type: direct:development
...

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

composer.json

@@ -32,7 +32,7 @@
     "require-dev": {
         "guzzlehttp/psr7": "^2.6.2",
         "guzzlehttp/guzzle": "^7.8.1",
-        "orchestra/testbench": "^8.22.0",
+        "orchestra/testbench": "^8.22.0 || ^9.0.0",
         "phpunit/phpunit": "^10.5.13",
         "vimeo/psalm": "^5.23.1",
         "squizlabs/php_codesniffer": "^3.9.0"