add multi-channels example

examples/livecoding_channels.rs

@@ -29,7 +29,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
 	    tx.as_ref().unwrap().send(url).await.unwrap();
 	}
     }
-    println!("links: {}", links.len());
+
     let mut results = vec![];
     // recieve the results and send back new url to the workers
     while let Some((idx, res)) = rx.recv().await {