[Backport to main] 2.3.0 release notes (#4457)#4464

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dreamer-89 merged 1 commit intoopensearch-project:mainfrom dreamer-89:release_notes_2.3_main

Sep 9, 2022

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Commits on Sep 9, 2022

2.3.0 release notes (opensearch-project#4457 )
dreamer-89
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