Fix more configlet links

[ee7]

I was expecting these links to work after #159.

But if you go to https://exercism.lol/docs/building/configlet, it contains e.g.:

How these documents are generated can be found here

where the links go to e.g.
https://exercism.lol/docs/building/generating-documents (broken)
rather than
https://exercism.lol/docs/building/configlet/generating-documents

So I've tried to fix this by adding configlet/. Is this what we want?

This feels weird to me because README.md is in the building/configlet directory - I was expecting ./ in this file to be relative to the building/configlet directory, not the building directory.

When I understand better I'll also push a commit to this PR for some broken links in generating-documents.

[iHiD]

I think this is correct.

To be clear, this is just web-links, not any magic I'm doing.

/configlet is treated as a webpage. ./ is the directory the webpage is in (from a browser perspective). So ./configlet/uuid makes sense in terms of saying the uuid webpage in the configlet directory relative to the configlet webpage.

I alwaysy find it confusing to get right too :)

[ee7]

Closing - Erik fixed all these in #200.