Bump ambience from 703f6c4 to adecc1b

Bumps [ambience](https://github.com/minetest-mirrors/ambience) from `703f6c4` to `adecc1b`.
- [Commits](minetest-mirrors/ambience@703f6c4...adecc1b)

---
updated-dependencies:
- dependency-name: ambience
  dependency-type: direct:production
...

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