chore(deps): update metrics-exporter-prometheus requirement (#96)

Updates the requirements on [metrics-exporter-prometheus](https://github.com/metrics-rs/metrics) to permit the latest version.
- [Changelog](https://github.com/metrics-rs/metrics/blob/main/release.toml)
- [Commits](metrics-rs/metrics@metrics-exporter-prometheus-v0.17.0...metrics-exporter-prometheus-v0.18.0)

---
updated-dependencies:
- dependency-name: metrics-exporter-prometheus
  dependency-version: 0.18.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Cargo.toml

@@ -37,7 +37,7 @@ url = "2.5.4"
 
 # Metrics
 metrics = "0.24.1"
-metrics-exporter-prometheus = "0.17.0"
+metrics-exporter-prometheus = "0.18.0"
 
 # Slot Calc
 chrono = "0.4.40"