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
...

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

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

substrate/client/network/sync/Cargo.toml

@@ -26,7 +26,7 @@ futures = "0.3.21"
 libp2p = "0.44.0"
 log = "0.4.17"
 lru = "0.7.5"
-prost = "0.9"
+prost = "0.10"
 smallvec = "1.8.0"
 thiserror = "1.0"
 fork-tree = { version = "3.0.0", path = "../../../utils/fork-tree" }