Fixed double header issue (#23895)

Author: JainRah

specification/network/resource-manager/Microsoft.Network/stable/2022-11-01/examples/NetworkVirtualAppliancePut.json

@@ -110,9 +110,7 @@
     },
     "201": {
       "headers": {
-        "headers": {
-          "location": "https://management.azure.com/subscriptions/00000000-0000-0000-0000-000000000000/providers/Microsoft.Network/locations/westus/nfvOperations/00000000-0000-0000-0000-000000000000?api-version=2022-11-01"
-        }
+        "location": "https://management.azure.com/subscriptions/00000000-0000-0000-0000-000000000000/providers/Microsoft.Network/locations/westus/nfvOperations/00000000-0000-0000-0000-000000000000?api-version=2022-11-01"
       },
       "body": {
         "name": "nva",