chore(deps): bump rkyv from 0.8.15 to 0.8.16 (#531)

Bumps [rkyv](https://github.com/rkyv/rkyv) from 0.8.15 to 0.8.16.
- [Release notes](https://github.com/rkyv/rkyv/releases)
- [Commits](https://github.com/rkyv/rkyv/commits)

---
updated-dependencies:
- dependency-name: rkyv
  dependency-version: 0.8.16
  dependency-type: indirect
...

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Author: dependabot[bot]