docs: replace segment with (:segment)
docs: replace segment with (:segment)

Make it more precise.

kenjis/CodeIgniter4,samsonasik/CodeIgniter4,samsonasik/CodeIgniter4,samsonasik/CodeIgniter4,lonnieezell/CodeIgniter4,bcit-ci/CodeIgniter4,kenjis/CodeIgniter4,bcit-ci/CodeIgniter4,lonnieezell/CodeIgniter4,kenjis/CodeIgniter4,bcit-ci/CodeIgniter4,samsonasik/CodeIgniter4,lonnieezell/CodeIgniter4,samsonasik/CodeIgniter4,samsonasik/CodeIgniter4,bcit-ci/CodeIgniter4,lonnieezell/CodeIgniter4,lonnieezell/CodeIgniter4,bcit-ci/CodeIgniter4,kenjis/CodeIgniter4,kenjis/CodeIgniter4,lonnieezell/CodeIgniter4