Updated CHANGELOG

Signed-off-by: Marco Pracucci <marco@pracucci.com>

Author: pracucci

CHANGELOG.md

@@ -9,6 +9,7 @@
 * [ENHANCEMENT] Enable support for HA in the Cortex Alertmanager #147
 * [ENHANCEMENT] Support `alertmanager.fallback_config` option in the Alertmanager. #179
 * [ENHANCEMENT] Add support for S3 block storage. #181
+* [ENHANCEMENT] Add support for Azure block storage. #182
 * [BUGFIX] Add support the `local` ruler client type  #175
 * [BUGFIX] Fixes `ruler.storage.s3.url` argument for the Ruler. It used an incorrect argument. #177