Bump the cargo-dependencies group across 1 directory with 2 updates

Bumps the cargo-dependencies group with 2 updates in the / directory: [metrics](https://github.com/metrics-rs/metrics) and [metrics-exporter-prometheus](https://github.com/metrics-rs/metrics).


Updates `metrics` from 0.22.3 to 0.23.0
- [Changelog](https://github.com/metrics-rs/metrics/blob/main/release.toml)
- [Commits](metrics-rs/metrics@metrics-v0.22.3...metrics-v0.23.0)

Updates `metrics-exporter-prometheus` from 0.14.0 to 0.15.0
- [Changelog](https://github.com/metrics-rs/metrics/blob/main/release.toml)
- [Commits](metrics-rs/metrics@metrics-exporter-prometheus-v0.14.0...metrics-exporter-prometheus-v0.15.0)

---
updated-dependencies:
- dependency-name: metrics
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: cargo-dependencies
- dependency-name: metrics-exporter-prometheus
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: cargo-dependencies
...

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

Cargo.toml

@@ -10,8 +10,8 @@ axum-extra = { version = "0.9.3", features = ["query"] }
 chrono = "0.4.38"
 clap = { version = "~4.4.18", features = ["derive", "env"] }
 emfcamp-schedule-api = { git = "https://github.com/DanNixon/emfcamp-schedule-api", rev = "a32795af01c50c3491805193aa263df271c5edc7" }
-metrics = "0.22.3"
-metrics-exporter-prometheus = { version = "0.14.0", default-features = false, features = ["http-listener"] }
+metrics = "0.23.0"
+metrics-exporter-prometheus = { version = "0.15.0", default-features = false, features = ["http-listener"] }
 rand = "0.8.5"
 serde = { version = "1.0.202", features = ["derive"] }
 serde_json = "1.0.117"