chore: Try deflake L1 reorgs test (#17607)

Increase timeout for detecting new block number. In a failed run, the
archiver finds the new block during test shutdown.

Author: spalladino

yarn-project/end-to-end/src/e2e_epochs/epochs_l1_reorgs.test.ts

@@ -258,7 +258,7 @@ describe('e2e_epochs/epochs_l1_reorgs', () => {
       await blobSinkClient.sendBlobsToBlobSink(blobs);
 
       // And wait for the node to see the new block
-      await retryUntil(() => node.getBlockNumber().then(b => b === L2_BLOCK_NUMBER), 'node sync', 5, 0.1);
+      await retryUntil(() => node.getBlockNumber().then(b => b === L2_BLOCK_NUMBER), 'node sync', 20, 0.1);
     });
   });