Fixed proxy paths (Azure#16496)

Author: darkoa-msft

specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/deviceupdate.json

@@ -981,7 +981,7 @@
         }
       }
     },
-    "/subscriptions/{subscriptionId}/providers/{resourceGroupName}/providers/Microsoft.DeviceUpdate/accounts/{accountName}/privateEndpointConnectionProxies/{privateEndpointConnectionProxyId}/validate": {
+    "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.DeviceUpdate/accounts/{accountName}/privateEndpointConnectionProxies/{privateEndpointConnectionProxyId}/validate": {
       "post": {
         "description": "(INTERNAL - DO NOT USE) Validates a private endpoint connection proxy object.",
         "operationId": "PrivateEndpointConnectionProxies_Validate",
@@ -1030,7 +1030,7 @@
         "deprecated": false
       }
     },
-    "/subscriptions/{subscriptionId}/providers/{resourceGroupName}/providers/Microsoft.DeviceUpdate/accounts/{accountName}/privateEndpointConnectionProxies/{privateEndpointConnectionProxyId}": {
+    "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.DeviceUpdate/accounts/{accountName}/privateEndpointConnectionProxies/{privateEndpointConnectionProxyId}": {
       "get": {
         "tags": [
           "PrivateEndpointConnections"