Minor fixes to CHANGELOG (#8179) (#8180)

This fixes some minor differences with the 2.x changelog

Signed-off-by: Kartik Ganesh <gkart@amazon.com>
(cherry picked from commit e6fd76c)

CHANGELOG.md

@@ -55,7 +55,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ### Deprecated
 
 ### Removed
-Remove `COMPRESSOR` variable from `CompressorFactory` and use `DEFLATE_COMPRESSOR` instead ([7907](https://github.com/opensearch-project/OpenSearch/pull/7907))
+- Remove `COMPRESSOR` variable from `CompressorFactory` and use `DEFLATE_COMPRESSOR` instead ([7907](https://github.com/opensearch-project/OpenSearch/pull/7907))
 
 ### Fixed
 - Fixing error: adding a new/forgotten parameter to the configuration for checking the config on startup in plugins/repository-s3 #7924