modern sync: bump timeout

Summary: Cause waiting 5 min is better than failing the sync due to timeout and restarting

Reviewed By: andreacampi

Differential Revision: D68747538

fbshipit-source-id: 556d94f85dfd77f3f3cf5f10648b14d61ad34e53

eden/mononoke/modern_sync/src/sender/edenapi.rs

@@ -88,7 +88,7 @@ impl EdenapiSender {
             .repo_name(&reponame)
             .server_url(url)
             .http_config(http_config)
-            .timeout(Duration::from_secs(20))
+            .timeout(Duration::from_secs(300))
             .build()?;
 
         client.health().await?;