Bump opentelemetry-otlp from 0.31.0 to 0.31.1 (#427)

Bumps [opentelemetry-otlp](https://github.com/open-telemetry/opentelemetry-rust) from 0.31.0 to 0.31.1.
- [Release notes](https://github.com/open-telemetry/opentelemetry-rust/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-rust/blob/main/docs/release_0.30.md)
- [Commits](open-telemetry/opentelemetry-rust@v0.31.0...opentelemetry-otlp-0.31.1)

---
updated-dependencies:
- dependency-name: opentelemetry-otlp
  dependency-version: 0.31.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Cargo.lock

@@ -82,7 +82,7 @@ toml = "1.0.7"
 metrics-util = "0.20.1"
 metrics-exporter-prometheus = "0.18"
 opentelemetry = "0.31.0"
-opentelemetry-otlp = { version = "0.31.0", default-features = false, features = ["http-proto", "reqwest-blocking-client", "grpc-tonic"] }
+opentelemetry-otlp = { version = "0.31.1", default-features = false, features = ["http-proto", "reqwest-blocking-client", "grpc-tonic"] }
 opentelemetry-semantic-conventions = "0.31"
 opentelemetry_sdk = { version = "0.31.0", features = ["rt-tokio"] }
 tokio = { version = "1.50.0", features = ["full"] }