Improvements to YAML contents

Pepijn made some content suggestions in this comment: https://code.greenhost.net/greenhost/website/-/issues/445#note_112246

Question or problem

Change the text:

How would you best describe your technical question?

into:

How would you best describe your technical question or problem?

and do this for all questions/problems

Additional content/ changes to content

Add these questions:

• How do I create a new emailaccount
• How do I change the DNS records for my domain
• What can I do when my quota is full

Move this:

I want to change the password of a email user. (And rewrite it into a question: how do I...)

remove:

Where can I find your terms and conditions?