Enhance generator to update changelog only if generated code differs …

…from existing

Signed-off-by: saimedhi <[email protected]>

CHANGELOG.md

@@ -13,7 +13,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Added GHA release ([#614](https://github.com/opensearch-project/opensearch-py/pull/614))
 - Incorporated API generation into CI workflow and fixed 'generate' nox session ([#660](https://github.com/opensearch-project/opensearch-py/pull/660))
 - Added an automated api update bot for opensearch-py ([#664](https://github.com/opensearch-project/opensearch-py/pull/664)) 
-- Enhance generator to update changelog only if generated code differs from existing ([#682](https://github.com/opensearch-project/opensearch-py/pull/682))
+- Enhance generator to update changelog only if generated code differs from existing ([#684](https://github.com/opensearch-project/opensearch-py/pull/684))
 ### Changed
 - Updated the `get_policy` API in the index_management plugin to allow the policy_id argument as optional ([#633](https://github.com/opensearch-project/opensearch-py/pull/633))
 - Updated the `point_in_time.md` guide with examples demonstrating the usage of the new APIs as alternatives to the deprecated ones. ([#661](https://github.com/opensearch-project/opensearch-py/pull/661))