test(optimism): Take only one error as it causes an unbounded number of reconnects

Author: RomanHodulak

crates/optimism/flashblocks/src/ws/stream.rs

@@ -333,7 +333,7 @@ mod tests {
         let stream = WsFlashBlockStream::with_connector(ws_url, messages);
 
         let actual_messages: Vec<_> =
-            stream.map(Result::unwrap_err).map(|e| format!("{e}")).collect().await;
+            stream.take(1).map(Result::unwrap_err).map(|e| format!("{e}")).collect().await;
         let expected_messages = vec!["Attack attempt detected".to_owned()];
 
         assert_eq!(actual_messages, expected_messages);