Update opentelemetry-semantic-conventions requirement from 0.15 to 0.25

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)
- [Commits](open-telemetry/opentelemetry-rust@opentelemetry-semantic-conventions-0.15.0...opentelemetry-semantic-conventions-0.25.0)

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

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

Cargo.toml

@@ -23,7 +23,7 @@ awc = { version = "3.0", optional = true, default-features = false, features = [
 futures-util = { version = "0.3", default-features = false, features = ["alloc"] }
 opentelemetry = { version = "0.23", default-features = false, features = ["trace"] }
 opentelemetry-prometheus = { version = "0.16", optional = true }
-opentelemetry-semantic-conventions = "0.15"
+opentelemetry-semantic-conventions = "0.25"
 prometheus = { version = "0.13", default-features = false, optional = true }
 serde = "1.0"