add changelog

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

CHANGELOG.md

@@ -7,16 +7,17 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 ### Added
 - Adds GlobalIOUsage struct for nodes stats ([#506](https://github.com/opensearch-project/opensearch-go/pull/506))
 - Adds the `Explanation` field containing the document explain details to the `SearchHit` struct. ([#504](https://github.com/opensearch-project/opensearch-go/pull/504))
-- Adds the `Fields` field containing the document fields to the `SearchHit` struct. ([#508](https://github.com/opensearch-project/opensearch-go/pull/508))
 - Adds new error types ([#512](https://github.com/opensearch-project/opensearch-go/pull/506))
 - Adds handling of non json errors to ParseError ([#512](https://github.com/opensearch-project/opensearch-go/pull/506))
+- Adds the `Failures` field to opensearchapi structs ([#510](https://github.com/opensearch-project/opensearch-go/pull/510))
 
 ### Changed
 - Use docker compose v2 instead of v1 ([#506](https://github.com/opensearch-project/opensearch-go/pull/506))
 - Updates go version to 1.21 ([#509](https://github.com/opensearch-project/opensearch-go/pull/509))
 - Moved Error structs from opensearchapi to opensearch package ([#512](https://github.com/opensearch-project/opensearch-go/pull/506))
 - Move parseError function from opensearchapi to opensearch package as ParseError ([#512](https://github.com/opensearch-project/opensearch-go/pull/506))
 - Change ParseError function to do type assertion to determine error type ([#512](https://github.com/opensearch-project/opensearch-go/pull/506))
+- Changed bulk error/reason field and some cat response fields to pointer as they can be nil ([#510](https://github.com/opensearch-project/opensearch-go/pull/510))
 
 ### Deprecated
 
@@ -185,4 +186,4 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 [2.1.0]: https://github.com/opensearch-project/opensearch-go/compare/v2.0.1...v2.1.0
 [2.0.1]: https://github.com/opensearch-project/opensearch-go/compare/v2.0.0...v2.0.1
 [2.0.0]: https://github.com/opensearch-project/opensearch-go/compare/v1.1.0...v2.0.0
-[1.0.0]: https://github.com/opensearch-project/opensearch-go/compare/v1.0.0...v1.1.0
+[1.0.0]: https://github.com/opensearch-project/opensearch-go/compare/v1.0.0...v1.1.0