update changelog

Signed-off-by: Ben Ye <benye@amazon.com>

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## master / unreleased
 * [CHANGE] Alertmanager: Validating new fields on the PagerDuty AM config. #5290
 * [CHANGE] Ingester: Creating label `native-histogram-sample` on the `cortex_discarded_samples_total` to keep track of discarded native histogram samples. #5289
+* [FEATURE] Store Gateway: Add `max_downloaded_bytes_per_request` to limit max bytes to download per store gateway request.
 * [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