warm_bookmarks_cache: log warm-up in thousands not hundreds

Summary: Now that warm-up is faster and there are increasingly more repos, switch to logging every 1000 bookmarks to reduce logspam.

Reviewed By: lmvasquezg

Differential Revision: D63949004

fbshipit-source-id: f4fa4be489b0ac455199e721a53e2d06ea042844

eden/mononoke/bookmarks/warm_bookmarks_cache/lib.rs

@@ -555,7 +555,7 @@ async fn init_bookmarks(
         .buffered(100)
         .try_filter_map(|element| async move {
             let (remaining, entry) = element;
-            if remaining % 100 == 0 {
+            if remaining % 1000 == 0 {
                 info!(ctx.logger(), "{} bookmarks left to warm up", remaining);
             }
             Result::<_, Error>::Ok(entry)