build(deps): update prost requirement from 0.12 to 0.13

Updates the requirements on [prost](https://github.com/tokio-rs/prost) to permit the latest version.
- [Release notes](https://github.com/tokio-rs/prost/releases)
- [Changelog](https://github.com/tokio-rs/prost/blob/master/CHANGELOG.md)
- [Commits](tokio-rs/prost@v0.12.0...v0.12.6)

---
updated-dependencies:
- dependency-name: prost
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.toml

@@ -34,7 +34,7 @@ nix = "0.28"
 oci-spec = "0.6"
 os_pipe = "1.1"
 prctl = "1.0.0"
-prost = "0.12"
+prost = "0.13"
 prost-build = "0.12"
 prost-types = "0.12"
 serde = { version = "1.0", features = ["derive"] }