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/light/Cargo.toml

@@ -23,7 +23,7 @@ codec = { package = "parity-scale-codec", version = "3.0.0", features = [
 futures = "0.3.21"
 libp2p = "0.44.0"
 log = "0.4.16"
-prost = "0.9"
+prost = "0.10"
 sp-blockchain = { version = "4.0.0-dev", path = "../../../primitives/blockchain" }
 sc-client-api = { version = "4.0.0-dev", path = "../../api" }
 sc-network-common = { version = "0.10.0-dev", path = "../common" }