Bump zerocopy from 0.7.28 to 0.7.30 in /rust (#407)

Bumps [zerocopy](https://github.com/google/zerocopy) from 0.7.28 to 0.7.30.
- [Release notes](https://github.com/google/zerocopy/releases)
- [Commits](google/zerocopy@v0.7.28...v0.7.30)

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

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