add missing x-ms-pageable (#19390)

Author: audunn

specification/netapp/resource-manager/Microsoft.NetApp/stable/2022-01-01/netapp.json

@@ -1331,6 +1331,9 @@
             "$ref": "../../../../../common-types/resource-management/v2/types.json#/parameters/ApiVersionParameter"
           }
         ],
+        "x-ms-pageable": {
+          "nextLinkName": null
+        },
         "responses": {
           "200": {
             "description": "OK",