Update {azure-rest-api-specs} (#18407)

Fixes Azure/azure-sdk-for-net#21637

Author: RakeshMohanMSFT

specification/frontdoor/resource-manager/Microsoft.Network/stable/2020-11-01/network.json

@@ -76,7 +76,7 @@
       "properties": {
         "status": {
           "type": "string",
-          "description": "Status of the Azure async operation. Possible values are: 'InProgress', 'Succeeded', and 'Failed'.",
+          "description": "Status of the Azure async operation.",
           "enum": [
             "InProgress",
             "Succeeded",