Bump snafu from 0.8.6 to 0.8.9

Bumps [snafu](https://github.com/shepmaster/snafu) from 0.8.6 to 0.8.9.
- [Changelog](https://github.com/shepmaster/snafu/blob/main/CHANGELOG.md)
- [Commits](shepmaster/snafu@0.8.6...0.8.9)

---
updated-dependencies:
- dependency-name: snafu
  dependency-version: 0.8.9
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]