Your requirements could not be resolved to an installable set of packages.
Problem 1
- orchestra/testbench[v9.0.0, ..., v9.1.2] require phpunit/phpunit ^10.5 || ^11.0.1 -> found phpunit/phpunit[10.5.0, ..., 10.5.20, 11.0.1, ..., 11.2.1] but it conflicts with your root composer.json require (^9.6).
- Root composer.json requires orchestra/testbench ^9 -> satisfiable by orchestra/testbench[v9.0.0, ..., v9.1.2].