doc: add changelog

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

CHANGELOG.md

@@ -21,6 +21,8 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - fix: Fix dynamic uses of i18n([#335](https://github.com/opensearch-project/dashboards-assistant/pull/335))
 - fix: Fix unrecognized creating index pattern duplicate cases([#337](https://github.com/opensearch-project/dashboards-assistant/pull/337))
 - fix: Remove the cache of insight agent id in node server([#343](https://github.com/opensearch-project/dashboards-assistant/pull/343))
+- fix: Fix error time field and add filter for same name index patterns([#345](https://github.com/opensearch-project/dashboards-assistant/pull/345))
+
 
 ### 📈 Features/Enhancements