fix: rename to correctly log which task is closed on shutdown

src/main.rs

@@ -61,7 +61,7 @@ async fn main() {
             tracing::info!("SIGTERM received");
             cancel_token.cancel();
             let res = conn_task.await;
-            tracing::info!(api_task_result = ?res, "shutdown complete");
+            tracing::info!(proxy_task_result = ?res, "shutdown complete");
         }
     }
 }