Added an automated api update bot for opensearch-py

Signed-off-by: saimedhi <saimedhi@amazon.com>

Author: saimedhi

.github/workflows/update_api.yml

@@ -28,10 +28,9 @@ jobs:
         run: nox -s generate
       - name: Update CHANGELOG
         uses: jacobtomlinson/gha-find-replace@v3
-        if: ${{ steps.cpr.outputs.pull-request-number != '' }}
         with:
-          find: "- Your contribution here."
-          replace: "- Updated opensearch-py to reflect the latest OpenSearch API spec.\n- Your contribution here."
+          find: "### Updated APIs"
+          replace: "### Updated APIs\n- Updated opensearch-py to reflect the latest OpenSearch API spec."
           include: "**CHANGELOG.md"
       - name: Get current date
         id: date

CHANGELOG.md

@@ -21,8 +21,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 ### Fixed
 - Fix KeyError when scroll return no hits ([#616](https://github.com/opensearch-project/opensearch-py/pull/616))
 - Fix reuse of `OpenSearch` using `Urllib3HttpConnection` and `AsyncOpenSearch` after calling `close` ([#639](https://github.com/opensearch-project/opensearch-py/pull/639))
-### Automated API Update
-- Your contribution here.
+### Updated APIs
 ### Security
 ### Dependencies
 - Bumps `pytest-asyncio` from <=0.21.1 to <=0.23.4
@@ -37,6 +36,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Fix `TypeError` on `parallel_bulk` ([#601](https://github.com/opensearch-project/opensearch-py/pull/601))
 - Fix Amazon OpenSearch Serverless integration with LangChain ([#603](https://github.com/opensearch-project/opensearch-py/pull/603))
 - Fix type of `Field.__setattr__` ([604](https://github.com/opensearch-project/opensearch-py/pull/604))
+### Updated APIs
 ### Security
 
 ## [2.4.1]