Update Rust crate metrics-exporter-prometheus to 0.18.0

Author: renovate[bot]

Cargo.lock

@@ -21,7 +21,7 @@ clap = { version = "4.5.23", features = ["derive"] }
 clap-verbosity-flag = {version = "3.0.2", features = ["tracing"]}
 futures = "0.3.31"
 metrics = "0.24.1"
-metrics-exporter-prometheus = "0.17.0"
+metrics-exporter-prometheus = "0.18.0"
 rdkafka = "0.38.0"
 risotto-lib = { path = "../risotto-lib", version = "0.6.0" }
 serde = { version = "1.0.217", features = ["derive"] }