Bump anyhow from 1.0.75 to 1.0.78 in /rust (#47)

Bumps [anyhow](https://github.com/dtolnay/anyhow) from 1.0.75 to 1.0.78.
- [Release notes](https://github.com/dtolnay/anyhow/releases)
- [Commits](dtolnay/anyhow@1.0.75...1.0.78)

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

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