The command set of a certain bot in a certain chat has changed.
updateBotCommands#4d712f2e peer:Peer bot_id:long commands:Vector<BotCommand> = Update;
|peer||Peer||The affected chat|
|bot_id||long||ID of the bot that changed its command set|
|commands||Vector<BotCommand>||New bot commands|
Bots offer a set of commands that can be used by users in private, or in a chat.