Bump i3 from `7e0feef` to `56cb236`

Bumps [i3](https://github.com/minetest-mods/i3) from `7e0feef` to `56cb236`.
- [Release notes](https://github.com/minetest-mods/i3/releases)
- [Commits](https://github.com/minetest-mods/i3/compare/7e0feefc895950abfba9bf973688211354eb0776...56cb236025f0de975d0fd6a13c87524a41a6b717)

i3 @ 56cb2360

-Subproject commit 7e0feefc895950abfba9bf973688211354eb0776
+Subproject commit 56cb236025f0de975d0fd6a13c87524a41a6b717