Update 2.11.1 release notes (#589) (#591)

Signed-off-by: Heemin Kim <heemin@amazon.com>
(cherry picked from commit 3305da1)

Co-authored-by: Heemin Kim <heemin@amazon.com>

Author: opensearch-trigger-bot[bot]

release-notes/opensearch-geospatial.release-notes-2.11.1.0.md

@@ -2,6 +2,6 @@
 
 Compatible with OpenSearch 2.11.1
 
-### Enhancements
+### Bug Fixes
 * Add default value in denylist ([#583](https://github.com/opensearch-project/geospatial/pull/583))
 * Add denylist ip config for datasource endpoint ([#573](https://github.com/opensearch-project/geospatial/pull/573))