Update prost-build requirement from 0.12 to 0.13

Updates the requirements on [prost-build](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...v0.13.3)

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

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

metrics-exporter-tcp/Cargo.toml

@@ -26,7 +26,7 @@ mio = { version = "1.0", default-features = false, features = ["os-poll", "net"]
 tracing = { version = "0.1", default-features = false, features = ["attributes"] }
 
 [build-dependencies]
-prost-build = "0.12"
+prost-build = "0.13"
 home = "0.5.9"
 
 [dev-dependencies]

metrics-observer/Cargo.toml

@@ -27,5 +27,5 @@ ratatui = { version = "0.28.0", default-features = false, features = ["crossterm
 chrono = { version = "0.4", default-features = false, features = ["clock"] }
 
 [build-dependencies]
-prost-build = "0.12"
+prost-build = "0.13"
 home = "0.5.9"