Update orchestra/testbench requirement from ^7.14 to ^7.38

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/develop/CHANGELOG-7.x.md)
- [Commits](orchestral/testbench@v7.14.0...v7.38.0)

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

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

composer.json

@@ -29,7 +29,7 @@
         "test": "vendor/bin/phpunit"
     },
     "require-dev": {
-        "orchestra/testbench": "^7.14",
+        "orchestra/testbench": "^7.38",
         "orchestra/testbench-core": "^7.14",
         "phpunit/phpunit": "^9.5.21",
         "vimeo/psalm": "4.24.0"