docs(Client): fix syntax error in fetchInvite example
docs(Client): fix syntax error in fetchInvite example

SpaceEEC/discord.js,Lewdcario/discord.js,hydrabolt/discord.js,Lewdcario/discord.js,SpaceEEC/discord.js,SpaceEEC/discord.js,hydrabolt/discord.js,appellation/discord.js,appellation/discord.js,Lewdcario/discord.js,appellation/discord.js,hydrabolt/discord.js