Bump rkyv from 0.8.8 to 0.8.9

Bumps [rkyv](https://github.com/rkyv/rkyv) from 0.8.8 to 0.8.9.
- [Release notes](https://github.com/rkyv/rkyv/releases)
- [Commits](https://github.com/rkyv/rkyv/commits)

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

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