新增群成员通知robot.group.member.changed

{
	"robotKey": "8c493a62a7ef409b9dffca746382cef0",
	"bizType": 5,
	"robotType": 2,
	"os": "winM",
	"isSendFromMac": 1,
	"code": "0",
	"msg": "OK",
	"conversationId": "R:10882650916486946",
	"messageId": "202404101154311817:1",
	"groupNickName": "",
	"sendTime": "2024-04-10 11:54:36",
	"sendTimeTs": 1712721276,
	"dts": 1712721276000,
	"newMembers": [{
		"userId": "1688855218535373"
	}],
	"quitedUserIds": [],
	"chatroom": "R:10882650916486946",
	"type": "robot.group.members.changed"
}