Update opentelemetry-prometheus to 0.28 (#1064)

Author: chrislearn

Cargo.toml

@@ -84,7 +84,7 @@ nix = { version = "0.29", default-features = false }
 openssl = { version = ">=0.10.0, <=0.10.69" }
 opentelemetry = { version = "0.28", default-features = false }
 opentelemetry-http = { version = "0.28", default-features = false }
-opentelemetry-prometheus = { version = "0.27", default-features = false }
+opentelemetry-prometheus = { version = "0.28", default-features = false }
 opentelemetry-semantic-conventions = { version = "0.28", default-features = false }
 parking_lot = "0.12"
 path-slash = "0.2"