code: func (w *Webhook) SendSingleActionCardMsg(title, content, linkTitle, linkURL string, hideAvatar, btnOrientation bool) error {
  	var strHideAvatar = "0"
  	if hideAvatar {
  		strHideAvatar = "1"
  	}
  	var strBtnOrientation = "0"
  	if btnOrientation {
  		strBtnOrientation = "1"
  	}
  
  	return w.SendPayload(&Payload{
  		MsgType: "actionCard",
  		ActionCard: ActionCard{
  			Text:           content,
  			Title:          title,
  			HideAvatar:     strHideAvatar,
  			BtnOrientation: strBtnOrientation,
  			SingleTitle:    linkTitle,
  			SingleURL:      linkURL,
  		},
  	})
  }
docs: // SendSingleActionCardMsg 发送整体跳转ActionCard类型消息