[ReleasePR azure-kusto] Expand comment on managedIdentityResourceId (#2214)

Create to sync Azure/azure-rest-api-specs#17962
[ReCreate this PR](https://github.com/azure-resource-manager-schemas/compare/main...AzureSDKAutomation:sdkAuto/azure-kusto?expand=1)

Author: msftbot[bot]

schemas/2022-02-01/Microsoft.Kusto.json

@@ -1511,7 +1511,7 @@
         },
         "managedIdentityResourceId": {
           "type": "string",
-          "description": "The resource ID of a managed identity (system or user assigned) to be used to authenticate with event hub."
+          "description": "Empty for non-managed identity based data connection. For system assigned identity, provide cluster resource Id.  For user assigned identity (UAI) provide the UAI resource Id."
         },
         "mappingRuleName": {
           "type": "string",