Update item method fix (#366)

**Related Issue(s):**

- #75 

**Description:**
- Changed item update operation to use Elasticsearch index API instead
of delete and create for better efficiency and atomicity.

**PR Checklist:**

- [x] Code is formatted and linted (run `pre-commit run --all-files`)
- [x] Tests pass (run `make test`)
- [x] Documentation has been updated to reflect changes, if applicable
- [x] Changes are added to the changelog

Author: jonhealy1

CHANGELOG.md

@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 - Updated dynamic mapping for items to map long values to double versus float [#326](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/326)
 - Extended Datetime Search to search on start_datetime and end_datetime as well as datetime fields. [#182](https://github.com/stac-utils/stac-fastapi-elasticsearch/pull/182)
+- Changed item update operation to use Elasticsearch index API instead of delete and create for better efficiency and atomicity. [#75](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/issues/75)
 
 ### Fixed
 

stac_fastapi/core/stac_fastapi/core/core.py

@@ -742,8 +742,7 @@ async def update_item(
         item["properties"]["updated"] = now
 
         await self.database.check_collection_exists(collection_id)
-        await self.delete_item(item_id=item_id, collection_id=collection_id)
-        await self.create_item(collection_id=collection_id, item=Item(**item), **kwargs)
+        await self.database.create_item(item, refresh=kwargs.get("refresh", False))
 
         return ItemSerializer.db_to_stac(item, base_url)