fix(sdk): Events loaded from the cache have EventsOrigin::Cache.

This patch fixes the `EventsOrigin` value for events loaded from the
cache, it was `Pagination`, now it is `Cache`.

crates/matrix-sdk/src/event_cache/pagination.rs

@@ -226,7 +226,7 @@ impl RoomPagination {
                         let _ =
                             self.inner.sender.send(RoomEventCacheUpdate::UpdateTimelineEvents {
                                 diffs: timeline_event_diffs,
-                                origin: EventsOrigin::Pagination,
+                                origin: EventsOrigin::Cache,
                             });
                     }