update changelog and doc

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

Author: yeya24

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## master / unreleased
 * [CHANGE] Upgrade Dockerfile Node version from 14x to 18x. #5906
 * [CHANGE] Ingester: Remove `-querier.query-store-for-labels-enabled` flag. Querying long-term store for labels is always enabled. #5984
+* [FEATURE] Ingester: Experimental: Enable native histogram ingestion via `-blocks-storage.tsdb.enable-native-histograms` flag. #5986
 * [ENHANCEMENT] rulers: Add support to persist tokens in rulers. #5987
 * [ENHANCEMENT] Query Frontend/Querier: Added store gateway postings touched count and touched size in Querier stats and log in Query Frontend. #5892
 * [ENHANCEMENT] Query Frontend/Querier: Returns `warnings` on prometheus query responses. #5916

docs/configuration/v1-guarantees.md

@@ -111,3 +111,5 @@ Currently experimental features are:
 - OTLP Receiver
 - Persistent tokens in the Ruler Ring:
   - `-ruler.ring.tokens-file-path` (path) CLI flag
+- Native Histograms
+  - Ingestion can be enabled by setting `-blocks-storage.tsdb.enable-native-histograms=true` on Ingester.