When I set someone's nickname for example Stack Overflow", It does not set It correctly. It sets my nickname to "stackoverflow", Without spaces.

My code:

const { MessageEmbed } = require('discord.js');
module.exports = {
    name: 'changenickname',
    aliases: ['changenick'],
    permissions: ["MANAGE_NICKNAMES"],
    cooldown: 5,
    description: "change your target's nickname",
    usage: "d!changenickname <@user> <nickname>",
    async execute(message, args, cmd, client, Discord, profileData){
        const target = message.mentions.members.first();
        const nickname = args.slice(1).join('');
        if(!target) return message.channel.send('Please specify a target to change nickname');
        if(!nickname) return message.channel.send('Please specify a nickname to change');
        if (member.roles.highest.position >= message.guild.me.roles.highest.position) return message.reply('I cannot moderate this user as their highest role is higher than mine or I have the same highest role position as them.')


        target.setNickname(nickname);
        const done = new MessageEmbed()
        .setColor("GREEN")
        .setTitle("✅ Done")
        .setDescription(`Changed <@${target.id}> nickname to ${nickname}`)
        .setTimestamp()
        message.channel.send({embeds: [done]})
    }
}

Note: The command sets the nickname without any error, but it must set the nicknames with spaces(if there were in args).

I am using discord.js v13 and node.js v16