Remove duplicate short option '-p' to fix router executable (#602)

Author: cebtenzzre

router/src/main.rs

@@ -165,7 +165,7 @@ struct Args {
     otlp_service_name: String,
 
     /// The Prometheus port to listen on.
-    #[clap(default_value = "9000", long, short, env)]
+    #[clap(default_value = "9000", long, env)]
     prometheus_port: u16,
 
     /// Unused for gRPC servers