Fix the "Paternity Pay" sentence link URL on the "Safeguard" page.
This make the "Paternity Pay" sentence link URL on the "Safeguard" page root-relative.
This does not change any other issues with that link because I am not sure of the relationship between the link text and the linked content, so I am not sure of the intent for the link. I can open a separate issue so someone who does know those things can clarify.