Bump prost from 0.9.0 to 0.10.3 (#11425)

Bumps [prost](https://github.com/tokio-rs/prost) from 0.9.0 to 0.10.3.
- [Release notes](https://github.com/tokio-rs/prost/releases)
- [Commits](https://github.com/tokio-rs/prost/compare/v0.9.0...v0.10.3)

---
updated-dependencies:
- dependency-name: prost
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

substrate/client/network/Cargo.toml

@@ -36,7 +36,7 @@ log = "0.4.17"
 lru = "0.7.5"
 parking_lot = "0.12.0"
 pin-project = "1.0.10"
-prost = "0.9"
+prost = "0.10"
 rand = "0.7.2"
 serde = { version = "1.0.136", features = ["derive"] }
 serde_json = "1.0.79"