Add Minetest and Minetest subgame to the repository topic or description for discoverability

[22i]

you can add topics next to the repository description

for much more Farlands hits discoverability and visibilty when searching github for recently updated minetest things

this will make Farlands show up when you search for minetest on github.

github mintest search https://github.com/search?o=desc&q=minetest&s=updated&type=Repositories&utf8=%E2%9C%93

[tobyplowy]

@D00Med have a look at this

[D00Med]

@22i Ok, thanks for pointing this out. I've added "minetest" and "minetest-subgame"

[tobyplowy]

@D00Med close?

[D00Med]

@tobyplowy Oh yes, thanks