chore(deps): update opentelemetry requirement from 0.27 to 0.28

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)
- [Commits](open-telemetry/opentelemetry-rust@opentelemetry-0.27.0...opentelemetry-0.27.1)

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

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

Cargo.toml

@@ -82,7 +82,7 @@ multimap = "0.10"
 native-tls = "0.2"
 nix = { version = "0.29", default-features = false }
 openssl = { version = ">=0.10.0, <=0.10.69" }
-opentelemetry = { version = "0.27", default-features = false }
+opentelemetry = { version = "0.28", default-features = false }
 opentelemetry-http = { version = "0.27", default-features = false }
 opentelemetry-prometheus = { version = "0.27", default-features = false }
 opentelemetry-semantic-conventions = { version = "0.27", default-features = false }