Add release notes for 2.6.0

Signed-off-by: Vijayan Balasubramanian <[email protected]>
(cherry picked from commit 9507dfd)

release-notes/opensearch-geospatial.release-notes-2.6.0.0.md

@@ -0,0 +1,14 @@
+## Version 2.6.0.0 Release Notes
+
+Compatible with OpenSearch 2.6.0
+
+### Maintenance
+* Upgrade snapshot version to 2.6 for 2.x ([#208](https://github.com/opensearch-project/geospatial/pull/208))
+
+### Features
+* Add limit to geojson upload API ([#218](https://github.com/opensearch-project/geospatial/pull/218))
+* Allow API to accept any index name without suffix ([#182](https://github.com/opensearch-project/geospatial/pull/182))
+
+### Refactoring
+* Fix compilation error and test failure ([#210](https://github.com/opensearch-project/geospatial/pull/210))
+* Replace Locale.getDefault() with Local.ROOT ([#214](https://github.com/opensearch-project/geospatial/pull/214))