add changelog

Signed-off-by: Jakob Hahn <jakob.hahn@hetzner.com>

CHANGELOG.md

@@ -86,6 +86,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Added `cluster_manager` to `ClusterNodeCount` ([#534](https://github.com/opensearch-project/opensearch-api-specification/pull/534))
 - Added support for `query` with `terms` in `_search` ([#546](https://github.com/opensearch-project/opensearch-api-specification/pull/546))
 - Added `h`, `bytes`, `time` parameters to cat API tests ([#551](https://github.com/opensearch-project/opensearch-api-specification/pull/551))
+- Added `Bytes` component of type numer ([#552](https://github.com/opensearch-project/opensearch-api-specification/pull/552))
 
 ### Changed
 
@@ -101,6 +102,8 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Split test suite ([#472])(https://github.com/opensearch-project/opensearch-api-specification/pull/472)
 - Changed `WriteResponseBase`'s `_primary_term`, `_seq_no` & `_version` to have `int64` format ([#530](https://github.com/opensearch-project/opensearch-api-specification/pull/530))
 - Adjust indices, shards cat API to test against unassigned indices ([#551](https://github.com/opensearch-project/opensearch-api-specification/pull/551))
+- Rename Bytes component to StorageType ([#552](https://github.com/opensearch-project/opensearch-api-specification/pull/552))
+- Rename ByteSize to StorageSize ([#552](https://github.com/opensearch-project/opensearch-api-specification/pull/552))
 
 ### Deprecated