Update minetest module, rename to luanti

[fgaz]

https://blog.luanti.org/2024/10/13/Introducing-Our-New-Name/

[carsakiller]

The GitHub action seems to be failing on line 88, and I have no idea why…

Apparently this could be due to trying to set a multi-line string as a ENV var source¹ — but that doesn't make much sense here to me as the action hasn't changed, and I doubt git has either.

Footnotes

1. https://github.com/orgs/community/discussions/24952 ↩

[carsakiller]

Never mind, I see now. Git is reporting that minetest and luanti have changed... on separate lines...