webhook.go
func (w *Webhook) SendLinkCardMsg(msgs []LinkMsg) error {
	return w.SendPayload(&Payload{
		MsgType: "feedCard",
		FeedCard: struct {
			Links []LinkMsg `json:"links"`
		}{
			Links: msgs,
		},
	})
}
func (w *Webhook) SendLinkCardMsg(msgs []LinkMsg) error {
	return w.SendPayload(&Payload{
		MsgType: "feedCard",
		FeedCard: struct {
			Links []LinkMsg `json:"links"`
		}{
			Links: msgs,
		},
	})
}
// SendLinkCardMsg 发送链接消息