Update opentelemetry requirement from 0.30.0 to 0.31.0

Updates the requirements on [opentelemetry](https://github.com/open-telemetry/opentelemetry-rust) to permit the latest version.
- [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@opentelemetry-0.30.0...v0.31.0)

---
updated-dependencies:
- dependency-name: opentelemetry
  dependency-version: 0.31.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

example-service/Cargo.toml

@@ -18,7 +18,7 @@ anyhow = "1.0"
 clap = { version = "4.4.18", features = ["derive"] }
 log = "0.4"
 futures = "0.3"
-opentelemetry = { version = "0.30.0" }
+opentelemetry = { version = "0.31.0" }
 opentelemetry-otlp = { version = "0.30.0", features = ["grpc-tonic"] }
 rand = "0.8"
 tarpc = { version = "0.37", path = "../tarpc", features = ["full"] }

tarpc/Cargo.toml

@@ -59,7 +59,7 @@ tracing = { version = "0.1", default-features = false, features = [
     "log",
 ] }
 tracing-opentelemetry = { version = "0.31.0", default-features = false }
-opentelemetry = { version = "0.30.0", default-features = false }
+opentelemetry = { version = "0.31.0", default-features = false }
 opentelemetry-semantic-conventions = "0.30.0"
 
 [dev-dependencies]
@@ -68,7 +68,7 @@ bincode = { version = "2.0", features = ["serde"] }
 bytes = { version = "1", features = ["serde"] }
 flate2 = "1.0"
 futures-test = "0.3"
-opentelemetry = { version = "0.30.0", default-features = false }
+opentelemetry = { version = "0.31.0", default-features = false }
 opentelemetry-otlp = { version = "0.30.0", features = ["grpc-tonic"] }
 opentelemetry_sdk = { version = "0.30.0", features = ["rt-tokio"] }
 pin-utils = "0.1.0"