Update opentelemetry-semantic-conventions requirement

Updates the requirements on [opentelemetry-semantic-conventions](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-semantic-conventions-0.30.0...v0.31.0)

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

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

Author: dependabot[bot]

example-service/Cargo.toml

@@ -27,7 +27,7 @@ tracing = { version = "0.1" }
 tracing-opentelemetry = "0.31.0"
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 opentelemetry_sdk = { version = "0.30.0", features = ["rt-tokio"] }
-opentelemetry-semantic-conventions = "0.30.0"
+opentelemetry-semantic-conventions = "0.31.0"
 
 [lib]
 name = "service"

tarpc/Cargo.toml

@@ -60,7 +60,7 @@ tracing = { version = "0.1", default-features = false, features = [
 ] }
 tracing-opentelemetry = { version = "0.31.0", default-features = false }
 opentelemetry = { version = "0.30.0", default-features = false }
-opentelemetry-semantic-conventions = "0.30.0"
+opentelemetry-semantic-conventions = "0.31.0"
 
 [dev-dependencies]
 assert_matches = "1.4"