Update opentelemetry_sdk requirement from 0.21 to 0.22

Updates the requirements on [opentelemetry_sdk](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@v0.21.0...v0.22.1)

---
updated-dependencies:
- dependency-name: opentelemetry_sdk
  dependency-type: direct:production
...

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

Cargo.toml

@@ -30,7 +30,7 @@ serde = "1.0"
 [dev-dependencies]
 actix-web = { version = "4.0", features = ["macros"] }
 actix-web-opentelemetry = { path = ".", features = ["metrics-prometheus", "sync-middleware", "awc"] }
-opentelemetry_sdk = { version = "0.21", features = ["metrics", "rt-tokio-current-thread"] }
+opentelemetry_sdk = { version = "0.22", features = ["metrics", "rt-tokio-current-thread"] }
 opentelemetry-jaeger = { version = "0.20", features = ["rt-tokio-current-thread"] }
 opentelemetry-stdout = { version = "0.2", features = ["trace", "metrics"] }