Your requirements could not be resolved to an installable set of packages.
Problem 1
- Root composer.json requires orchestra/testbench ^9.0 -> satisfiable by orchestra/testbench[9.x-dev].
- orchestra/testbench 9.x-dev requires phpunit/phpunit ^10.5 || ^11.0 -> found phpunit/phpunit[dev-main, 10.5.0, ..., 10.5.x-dev, 11.0.x-dev (alias of dev-main)] but it conflicts with your root composer.json require (~10.1.0).