feat: use default vars for admin account

      ANSIBLE_HOST_KEY_CHECKING: "False"

      # semaphore

      SEMAPHORE_ADMIN_EMAIL: "{{ semaphore_admin_email }}"

      SEMAPHORE_ADMIN_NAME: "{{ semaphore_admin_name }}"

      SEMAPHORE_ADMIN_PASSWORD: "{{ semaphore_admin_password }}"

      SEMAPHORE_ADMIN: "{{ semaphore_admin_username }}"

      SEMAPHORE_EMAIL_SENDER: "{{ semaphore_email_sender }}"

      SEMAPHORE_EMAIL_USERNAME: "{{ semaphore_email_username }}"

      SEMAPHORE_EMAIL_HOST: "{{ semaphore_email_host }}"