Fixing review findings

Signed-off-by: Yuri Nikolic <durica.nikolic@grafana.com>

CHANGELOG.md

@@ -8,6 +8,9 @@
 * [ENHANCEMENT] Query-frontend: add `cortex_query_frontend_enqueue_duration_seconds` metric that records the time taken to enqueue or reject a query request when not using the query-scheduler. #5879
 * [ENHANCEMENT] Expose `/sync/mutex/wait/total:seconds` Go runtime metric as `go_sync_mutex_wait_total_seconds_total` from all components. #5879
 * [ENHANCEMENT] Query-scheduler: improve latency with many concurrent queriers. #5880
+* [ENHANCEMENT] Go: updated to 1.21.1. #5955
+* [ENHANCEMENT] Ingester: added support for sampling errors, which can be enabled by setting `-ingester.error-sample-rate`. This way each error will be logged once in the configured number of times. #5584
+* [BUGFIX] Ingester: fix spurious `not found` errors on label values API during head compaction. #5957
 
 ### Mixin
 
@@ -167,7 +170,6 @@
 * [ENHANCEMENT] Store-gateway: always include `__name__` posting group in selection in order to reduce the number of object storage API calls. #5246
 * [ENHANCEMENT] Ingester: track active series by ref instead of hash/labels to reduce memory usage. #5134 #5193
 * [ENHANCEMENT] Alertmanager: update to alertmanager 0.26.0. #5840
-* [ENHANCEMENT] Ingester: added support for sampling errors, which can be enabled by setting `-ingester.error-sample-rate`. This way each error will be logged once in the configured number of times. #5584
 * [BUGFIX] Ingester: Handle when previous ring state is leaving and the number of tokens has changed. #5204
 * [BUGFIX] Querier: fix issue where queries that use the `timestamp()` function fail with `execution: attempted to read series at index 0 from stream, but the stream has already been exhausted` if streaming chunks from ingesters to queriers is enabled. #5370
 * [BUGFIX] memberlist: bring back `memberlist_client_kv_store_count` metric that used to exist in Cortex, but got lost during dskit updates before Mimir 2.0. #5377