[xmlunit/xmlunit.net] a10246: need to restore packages for Mono as well

[Stefan B. <no...@gi...>]

  Branch: refs/heads/main
  Home:   https://github.com/xmlunit/xmlunit.net
  Commit: a10246b33ccf12455c60629dbb7be840f81bc41c
      https://github.com/xmlunit/xmlunit.net/commit/a10246b33ccf12455c60629dbb7be840f81bc41c
  Author: Stefan Bodewig <bo...@ap...>
  Date:   2023-03-14 (Tue, 14 Mar 2023)

  Changed paths:
    M appveyor.yml

  Log Message:
  -----------
  need to restore packages for Mono as well