Bump minetest_game/tnt from 14217b5 to a4fbf34

Bumps [minetest_game/tnt](https://github.com/minetest-game/tnt) from `14217b5` to `a4fbf34`.
- [Commits](minetest-game/tnt@14217b5...a4fbf34)

---
updated-dependencies:
- dependency-name: minetest_game/tnt
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>