Update

Author: v-yuchenli

src/azure-cli/azure/cli/command_modules/hdinsight/_help.py

@@ -16,7 +16,7 @@
 helps['hdinsight application'] = """
 type: group
 short-summary: Manage HDInsight applications.
-long-summary: Since Api-version 2018-06-01-preview has been discontinued Az.HDInsight versions before 5.0.0 will \\
+long-summary: Since Api-version 2018-06-01-preview has been discontinued versions before 2.30.0 will \\
   not be available normally. Please update to the latest version to get the best service.
 """