Add PR 2656 number to changelog

Author: bboreham

CHANGELOG.md

@@ -4,7 +4,7 @@
 
 * [CHANGE] Query Frontend now uses Round Robin to choose a tenant queue to service next. #2553
 * [CHANGE] `-promql.lookback-delta` is now deprecated and has been replaced by `-querier.lookback-delta` along with `lookback_delta` entry under `querier` in the config file. `-promql.lookback-delta` will be removed in v1.4.0. #2604
-* [CHANGE] Removed `-store.fullsize-chunks` option which was undocumented and unused (it broke ingester hand-overs).
+* [CHANGE] Removed `-store.fullsize-chunks` option which was undocumented and unused (it broke ingester hand-overs). #2656
 * [FEATURE] TLS config options added for GRPC clients in Querier (Query-frontend client & Ingester client), Ruler, Store Gateway, as well as HTTP client in Config store client. #2502
 * [FEATURE] The flag `-frontend.max-cache-freshness` is now supported within the limits overrides, to specify per-tenant max cache freshness values. The corresponding YAML config parameter has been changed from `results_cache.max_freshness` to `limits_config.max_cache_freshness`. The legacy YAML config parameter (`results_cache.max_freshness`) will continue to be supported till Cortex release `v1.4.0`. #2609
 * [ENHANCEMENT] Experimental TSDB: added the following metrics to the ingester: #2580 #2583 #2589