Document config.yml

[bulofed]

Feature Description

Right now it is unclear how to disable nether and end world from spawning upon creating new worlds and making nether portals. It would be useful to point out that they spawn only in the worlds: {} config.

How the feature is useful

Make things more clear.

[benwoo1110]

we have a wiki page on it: https://mvplugins.org/netherportals/fundamentals/basic-usage/#Customizing-(%22linking%22)