Add CLI namespace to example
Add CLI namespace to example

Without CLI\CLI the demo command `run` listed below will fail with: Class 'App\Commands\CLI' not found. Adding the `use` so others don't run into this issue following the guide
butane/CodeIgniter4,samsonasik/CodeIgniter4,lonnieezell/CodeIgniter4,samsonasik/CodeIgniter4,kenjis/CodeIgniter4,lonnieezell/CodeIgniter4,kenjis/CodeIgniter4,jim-parry/CodeIgniter4,samsonasik/CodeIgniter4,kenjis/CodeIgniter4,butane/CodeIgniter4,ytetsuro/CodeIgniter4,jim-parry/CodeIgniter4,bcit-ci/CodeIgniter4,samsonasik/CodeIgniter4,ytetsuro/CodeIgniter4,bcit-ci/CodeIgniter4,natanfelles/CodeIgniter4,gustavojm/CodeIgniter4,gustavojm/CodeIgniter4,samsonasik/CodeIgniter4,natanfelles/CodeIgniter4,ytetsuro/CodeIgniter4,bcit-ci/CodeIgniter4,natanfelles/CodeIgniter4,jim-parry/CodeIgniter4,jim-parry/CodeIgniter4,gustavojm/CodeIgniter4,samsonasik/CodeIgniter4,butane/CodeIgniter4,natanfelles/CodeIgniter4,lonnieezell/CodeIgniter4,ytetsuro/CodeIgniter4,kenjis/CodeIgniter4,lonnieezell/CodeIgniter4,ytetsuro/CodeIgniter4,jim-parry/CodeIgniter4,lonnieezell/CodeIgniter4,bcit-ci/CodeIgniter4,gustavojm/CodeIgniter4,lonnieezell/CodeIgniter4,butane/CodeIgniter4,kenjis/CodeIgniter4,natanfelles/CodeIgniter4,natanfelles/CodeIgniter4,butane/CodeIgniter4,bcit-ci/CodeIgniter4,ytetsuro/CodeIgniter4,butane/CodeIgniter4,jim-parry/CodeIgniter4