Consider dropping MATH in docs

[capital-G]

MATH context is only available from 3.14+ - there are still people using >=3.13, which can not open the help file in this case.

[Spacechild1]

I was actually wondering about these tags because I haven't seen them before (and I've written lots of SCDox). I don't know how I missed this new feature!

But yes, the latest Debian (trixie) is still on 3.13. Not even 'unstable' has upgraded to 3.14 yet.

Although I'm not the biggest fan of always waiting for Debian to catch up, in this case it's not a big deal. It's not like we really need the fancy math notation :)