Bump metrics-util from 0.19.2 to 0.20.0 (#657)

Bumps [metrics-util](https://github.com/metrics-rs/metrics) from 0.19.2 to 0.20.0.
- [Changelog](https://github.com/metrics-rs/metrics/blob/main/release.toml)
- [Commits](metrics-rs/metrics@metrics-util-v0.19.2...metrics-util-v0.20.0)

---
updated-dependencies:
- dependency-name: metrics-util
  dependency-version: 0.20.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -99,7 +99,7 @@ opentelemetry_sdk = { version = "0.30.0", features = ["rt-tokio"] }
 tokio = { version = "1.45.1", features = ["full"] }
 criterion = "0.6.0"
 tracing-chrome = "0.7.2"
-metrics-util = "0.19.2"
+metrics-util = "0.20.0"
 metrics-exporter-prometheus = "0.17.1"
 tracing-tracy = "0.11.4"
 serde_json = "1.0"