Removed uuid format for PrincipalId in Identity properties

Author: mahakjain314

specification/automation/resource-manager/Microsoft.Automation/preview/2023-05-15-preview/account.json

@@ -951,7 +951,6 @@
         "principalId": {
           "readOnly": true,
           "type": "string",
-          "format": "uuid",
           "description": "The principal ID of resource identity. The value must be an UUID."
         },
         "tenantId": {