message: chore: fix a badge for Appveyor
diff: [![npm version](https://badge.fury.io/js/%40kintone%2Fcreate-plugin.svg)](https://badge.fury.io/js/%40kintone%2Fcreate-plugin)
  [![CircleCI](https://circleci.com/gh/kintone/create-plugin.svg?style=shield)](https://circleci.com/gh/kintone/create-plugin)
  -[![Build status](https://ci.appveyor.com/api/projects/status/emvyvmk1vd4rwbef?svg=true)](https://ci.appveyor.com/project/koba04/create-kintone-plugin)
  +[![Build status](https://ci.appveyor.com/api/projects/status/8yw1p1qntqlgg6v5?svg=true)](https://ci.appveyor.com/project/koba04/create-plugin)
  A CLI tool for creating a kintone plugin!
  