Add changelog

Signed-off-by: Justin Jung <[email protected]>

Author: justinjung04

CHANGELOG.md

@@ -14,6 +14,7 @@
 * [ENHANCEMENT] KV: Etcd Added etcd.ping-without-stream-allowed parameter to disable/enable  PermitWithoutStream #5933
 * [ENHANCEMENT] Ingester: Add a new `limits_per_label_set` limit. This limit functions similarly to `max_series_per_metric`, but allowing users to define the maximum number of series per LabelSet. #5950 #5993
 * [ENHANCEMENT] Store Gateway: Log gRPC requests together with headers configured in `http_request_headers_to_log`. #5958
+* [ENHANCEMENT] Store Gateway: Add token bucket limiter. #5958
 * [BUGFIX] Configsdb: Fix endline issue in db password. #5920
 * [BUGFIX] Ingester: Fix `user` and `type` labels for the `cortex_ingester_tsdb_head_samples_appended_total` TSDB metric. #5952