fixup! add doc comment

Author: jmartinesp

crates/matrix-sdk-ui/src/timeline/pinned_events_loader.rs

@@ -24,7 +24,8 @@ use ruma::{EventId, MilliSecondsSinceUnixEpoch, OwnedEventId};
 use thiserror::Error;
 use tracing::{debug, warn};
 
-const MAX_PINNED_EVENTS_CONCURRENT_REQUESTS: usize = 10;
+/// The max number of concurrent `/event` requests to run when loading pinned events.
+pub const MAX_PINNED_EVENTS_CONCURRENT_REQUESTS: usize = 10;
 
 /// Utility to load the pinned events in a room.
 pub struct PinnedEventsLoader {