General availability: Azure HDInsight API version updated

Now in general availability, [HDInsight 2021-01-01 API](https://docs.microsoft.com/rest/api/hdinsight/) adds a number of new features including availability zones, private link, and private endpoint configuration. This new HDInsight, 2021-06-01, can be enabled on any new or existing clustering in seconds, with zero downtime. [Learn more](https://docs.microsoft.com/rest/api/hdinsight/). * Features * SDK and Tools * Services * Open Source