Flkay quic test in check_block_multiple_connections (#31871)

Flkay quic test -- put the test code in else condition

streamer/src/nonblocking/quic.rs

@@ -1241,8 +1241,7 @@ pub mod test {
             // the stream -- expect it.
             let s2 = s2.err().unwrap();
             assert!(matches!(s2, quinn::ConnectionError::ApplicationClosed(_)));
-            return;
-        }
+        } else {
             let mut s2 = s2.unwrap();
             s1.write_all(&[0u8]).await.unwrap();
             s1.finish().await.unwrap();
@@ -1257,6 +1256,7 @@ pub mod test {
                 .await
                 .expect_err("shouldn't be able to open 2 connections");
         }
+    }
 
     pub async fn check_multiple_streams(
         receiver: Receiver<PacketBatch>,