Fixed types of severity and actions (#15607)

* Fixed types of severity and actions

* Reverted the type of the Severity field from "integer" back to "number"

Co-authored-by: Avi Jerafi <[email protected]>

Author: avjerafi

specification/monitor/resource-manager/Microsoft.Insights/preview/2021-02-01-preview/scheduledQueryRule_API.json

@@ -410,9 +410,7 @@
         },
         "actions": {
           "type": "object",
-          "items": {
-            "$ref": "#/definitions/Actions"
-          },
+          "$ref": "#/definitions/Actions",
           "description": "Actions to invoke when the alert fires."
         },
         "isWorkspaceAlertsStorageConfigured": {