Bump mods/moreblocks from `bbfd782` to `f8a7d66`

Bumps [mods/moreblocks](https://github.com/minetest-mods/moreblocks) from `bbfd782` to `f8a7d66`.
- [Release notes](https://github.com/minetest-mods/moreblocks/releases)
- [Commits](https://github.com/minetest-mods/moreblocks/compare/bbfd7823002a3f464b53b5e4f7a422b8bc24529b...f8a7d66403b4b1e2d87eeb4249a9be3edb906861)

moreblocks @ f8a7d664

-Subproject commit bbfd7823002a3f464b53b5e4f7a422b8bc24529b
+Subproject commit f8a7d66403b4b1e2d87eeb4249a9be3edb906861