[jira] [Created] (FLINK-39619) Add release note for flink 2.3 release

[Hao Li (Jira)]

Hao Li created FLINK-39619:
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             Summary: Add release note for flink 2.3 release
                 Key: FLINK-39619
                 URL: https://issues.apache.org/jira/browse/FLINK-39619
             Project: Flink
          Issue Type: Improvement
            Reporter: Hao Li






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