update changelog

Signed-off-by: Ben Ye <[email protected]>

Author: yeya24

CHANGELOG.md

@@ -70,6 +70,7 @@
 * [ENHANCEMENT] Querier: Check context before notifying scheduler and frontend. #5565
 * [ENHANCEMENT] QueryFrontend: Add metric for number of series requests. #5373
 * [ENHANCEMENT] Store Gateway: Add histogram metrics for total time spent fetching series and chunks per request. #5573
+* [ENHANCEMENT] Store Gateway: Check context in multi level cache. Add `cortex_store_multilevel_index_cache_fetch_duration_seconds` and `cortex_store_multilevel_index_cache_backfill_duration_seconds` to measure fetch and backfill latency. #5596
 * [BUGFIX] Ruler: Validate if rule group can be safely converted back to rule group yaml from protobuf message #5265
 * [BUGFIX] Querier: Convert gRPC `ResourceExhausted` status code from store gateway to 422 limit error. #5286
 * [BUGFIX] Alertmanager: Route web-ui requests to the alertmanager distributor when sharding is enabled. #5293