mark triggerUri secret

Author: anat-gilenson

specification/securityinsights/resource-manager/Microsoft.SecurityInsights/preview/2021-03-01-preview/AlertRules.json

@@ -1714,7 +1714,8 @@
       "properties": {
         "triggerUri": {
           "description": "Logic App Callback URL for this specific workflow.",
-          "type": "string"
+          "type": "string",
+          "x-ms-secret": true
         }
       },
       "required": [