deps: bump the opentelemetry group with 2 updates

Bumps the opentelemetry group with 2 updates: [opentelemetry-otlp](https://github.com/open-telemetry/opentelemetry-rust) and [tracing-opentelemetry](https://github.com/tokio-rs/tracing-opentelemetry).


Updates `opentelemetry-otlp` from 0.13.0 to 0.15.0
- [Release notes](https://github.com/open-telemetry/opentelemetry-rust/releases)
- [Commits](open-telemetry/opentelemetry-rust@v0.13.0...v0.15.0)

Updates `tracing-opentelemetry` from 0.21.0 to 0.23.0
- [Release notes](https://github.com/tokio-rs/tracing-opentelemetry/releases)
- [Changelog](https://github.com/tokio-rs/tracing-opentelemetry/blob/v0.1.x/CHANGELOG.md)
- [Commits](tokio-rs/tracing-opentelemetry@v0.21.0...v0.23.0)

---
updated-dependencies:
- dependency-name: opentelemetry-otlp
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: opentelemetry
- dependency-name: tracing-opentelemetry
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: opentelemetry
...

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

examples/metrics/Cargo.toml

@@ -13,12 +13,12 @@ futures = "0.3.30"
 hyper = { version = "0.14", features = ["server", "tcp", "http1"] }
 libp2p = { path = "../../libp2p", features = ["tokio", "metrics", "ping", "noise", "identify", "tcp", "yamux", "macros"] }
 opentelemetry = { version = "0.20.0", features = ["rt-tokio", "metrics"] }
-opentelemetry-otlp = { version = "0.13.0", features = ["metrics"]}
+opentelemetry-otlp = { version = "0.15.0", features = ["metrics"]}
 opentelemetry_api = "0.20.0"
 prometheus-client = { workspace = true }
 tokio = { version = "1", features = ["full"] }
 tracing = "0.1.37"
-tracing-opentelemetry = "0.21.0"
+tracing-opentelemetry = "0.23.0"
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 
 [lints]