Update prost requirement from 0.11.9 to 0.12.1

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)
- [Commits](tokio-rs/prost@v0.11.9...v0.12.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.toml

@@ -27,7 +27,7 @@ http = "0.2.6"
 h2 = "0.3"
 log = "0.4.16"
 once_cell = "1.10.0" 
-prost = "0.11.9"
+prost = "0.12.1"
 simple_logger = "4.1.0"
 tokio = { version = "1.28.1", features = ["macros", "rt", "signal"] }
 tokio-util = "0.7.8"