composer(deps-dev): bump orchestra/testbench from 6.24.1 to 6.26.0

Bumps [orchestra/testbench](https://github.com/orchestral/testbench) from 6.24.1 to 6.26.0.
- [Release notes](https://github.com/orchestral/testbench/releases)
- [Changelog](https://github.com/orchestral/testbench/blob/v6.26.0/CHANGELOG-6.x.md)
- [Commits](orchestral/testbench@v6.24.1...v6.26.0)

---
updated-dependencies:
- dependency-name: orchestra/testbench
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

composer.json

@@ -22,7 +22,7 @@
         "sofort/sofortlib-php": "^3.3"
     },
     "require-dev": {
-        "orchestra/testbench": "^6.24.1",
+        "orchestra/testbench": "^6.26.0",
         "phpunit/phpunit": "^9.6.4"
     },
     "autoload": {