bump arc-frontend to 1.3.0: now actually disable arched
bump arc-frontend to 1.3.0: now actually disable arched

 - https://github.com/CSC-IT-Center-for-Science/ansible-role-arc-frontend/releases/tag/v1.3.0
 - it wasn't because of a typo in defaults/main.yml

mantti/fgci-tut,mantti/fgci-tut,CSC-IT-Center-for-Science/fgci-ansible,mantti/fgci-tut