Update changelog.

CHANGELOG.md

@@ -27,12 +27,12 @@
 * [ENHANCEMENT] Blocks Storage, Alertmanager, Ruler: add support a prefix to the bucket store (`*_storage.storage_prefix`). This enables using the same bucket for the three components. #1686 #1951
 * [ENHANCEMENT] Upgrade Docker base images to `alpine:3.16.0`. #2028
 * [ENHANCEMENT] Store-gateway: Add experimental configuration option for the store-gateway to attempt to pre-populate the file system cache when memory-mapping index-header files. Enabled with `-blocks-storage.bucket-store.index-header.map-populate-enabled=true`. #2019
+* [ENHANCEMENT] Chunk Mapper: reduce memory usage of async chunk mapper. #2043
 * [BUGFIX] Fix regexp parsing panic for regexp label matchers with start/end quantifiers. #1883
 * [BUGFIX] Ingester: fixed deceiving error log "failed to update cached shipped blocks after shipper initialisation", occurring for each new tenant in the ingester. #1893
 * [BUGFIX] Ring: fix bug where instances may appear unhealthy in the hash ring web UI even though they are not. #1933
 * [BUGFIX] API: gzip is now enforced when identity encoding is explicitly rejected. #1864
 * [BUGFIX] Fix panic at startup when Mimir is running in monolithic mode and query sharding is enabled. #2036
-* [BUGFIX] Chunk Mapper: reduce memory usage of async chunk mapper. #2043
 
 ### Mixin