build(deps): update opentelemetry-stdout requirement from 0.2.0 to 0.3.0

Updates the requirements on [opentelemetry-stdout](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/v0.3.0/CHANGELOG.md)
- [Commits](open-telemetry/opentelemetry-rust@v0.2.0...v0.3.0)

---
updated-dependencies:
- dependency-name: opentelemetry-stdout
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Cargo.toml

@@ -44,7 +44,7 @@ criterion = { version = "0.5.1", default-features = false, features = ["html_rep
 opentelemetry = { version = "0.21.0", features = ["trace", "metrics"] }
 opentelemetry_sdk = { version = "0.21.0", default-features = false, features = ["trace", "rt-tokio"] }
 opentelemetry-jaeger = "0.20.0"
-opentelemetry-stdout = { version = "0.2.0", features = ["trace", "metrics"] }
+opentelemetry-stdout = { version = "0.3.0", features = ["trace", "metrics"] }
 opentelemetry-otlp = { version = "0.14.0", features = ["metrics"] }
 opentelemetry-semantic-conventions = "0.13.0"
 futures-util = { version = "0.3", default-features = false }