feat: add pre_task for updating role

- name: "install and configure a DHCP server"

  hosts: "all"

  become: true

  pre_tasks:

    # due to semaphore bug we need to do this ourselves

    - name: "force-update requirements"

      ansible.builtin.command:

        cmd: "ansible-galaxy install -f -r roles/requirements.yml"

      become: false

      delegate_to: "localhost"

      changed_when: false

      failed_when: false

  roles:

    - role: "dhcp"