update changelog

Signed-off-by: Daniel Deluiggi <ddeluigg@amazon.com>

Author: danielblando

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## master / unreleased
 
+* [BUGFIX] Ingester: Avoid error or early throttling when READONLY ingesters are present in the ring #6517
+
 ## 1.19.0 in progress
 
 * [CHANGE] Deprecate `-blocks-storage.tsdb.wal-compression-enabled` flag (use `blocks-storage.tsdb.wal-compression-type` instead). #6529
@@ -74,7 +76,6 @@
 * [BUGFIX] Ingester: Fix possible race condition when `active series per LabelSet` is configured. #6409
 * [BUGFIX] Query Frontend: Fix @ modifier not being applied correctly on sub queries. #6450
 * [BUGFIX] Cortex Redis flags with multiple dots #6476
-* [BUGFIX] Ingester: Avoid error or early throttling when READONLY ingesters are present in the ring #6517
 
 ## 1.18.1 2024-10-14